Mercurial > sdl-ios-xcode
annotate src/audio/SDL_audio.c @ 2204:9f64d06fa168
Added support for building version.rc in Windows build.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Mon, 16 Jul 2007 03:28:48 +0000 |
parents | a5f11bc178b4 |
children | 60b4c52a7906 |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
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3 Copyright (C) 1997-2006 Sam Lantinga |
0 | 4 |
5 This library is free software; you can redistribute it and/or | |
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6 modify it under the terms of the GNU Lesser General Public |
0 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
0 | 9 |
10 This library is distributed in the hope that it will be useful, | |
11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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13 Lesser General Public License for more details. |
0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
0 | 18 |
19 Sam Lantinga | |
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20 slouken@libsdl.org |
0 | 21 */ |
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22 #include "SDL_config.h" |
0 | 23 |
24 /* Allow access to a raw mixing buffer */ | |
25 | |
26 #include "SDL.h" | |
27 #include "SDL_audio_c.h" | |
28 #include "SDL_audiomem.h" | |
29 #include "SDL_sysaudio.h" | |
30 | |
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31 #define _THIS SDL_AudioDevice *this |
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32 |
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33 static SDL_AudioDriver current_audio; |
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34 static SDL_AudioDevice *open_devices[16]; |
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35 |
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36 /* !!! FIXME: These are wordy and unlocalized... */ |
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37 #define DEFAULT_OUTPUT_DEVNAME "System audio output device" |
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38 #define DEFAULT_INPUT_DEVNAME "System audio capture device" |
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39 |
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40 |
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41 /* |
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42 * Not all of these will be compiled and linked in, but it's convenient |
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43 * to have a complete list here and saves yet-another block of #ifdefs... |
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44 * Please see bootstrap[], below, for the actual #ifdef mess. |
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45 */ |
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46 extern AudioBootStrap BSD_AUDIO_bootstrap; |
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47 extern AudioBootStrap DSP_bootstrap; |
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48 extern AudioBootStrap DMA_bootstrap; |
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49 extern AudioBootStrap ALSA_bootstrap; |
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50 extern AudioBootStrap QNXNTOAUDIO_bootstrap; |
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51 extern AudioBootStrap SUNAUDIO_bootstrap; |
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52 extern AudioBootStrap DMEDIA_bootstrap; |
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53 extern AudioBootStrap ARTS_bootstrap; |
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54 extern AudioBootStrap ESD_bootstrap; |
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55 extern AudioBootStrap NAS_bootstrap; |
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56 extern AudioBootStrap DSOUND_bootstrap; |
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57 extern AudioBootStrap WINWAVEOUT_bootstrap; |
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58 extern AudioBootStrap PAUDIO_bootstrap; |
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59 extern AudioBootStrap BEOSAUDIO_bootstrap; |
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60 extern AudioBootStrap COREAUDIO_bootstrap; |
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61 extern AudioBootStrap SNDMGR_bootstrap; |
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62 extern AudioBootStrap MINTAUDIO_GSXB_bootstrap; |
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63 extern AudioBootStrap MINTAUDIO_MCSN_bootstrap; |
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64 extern AudioBootStrap MINTAUDIO_STFA_bootstrap; |
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65 extern AudioBootStrap MINTAUDIO_XBIOS_bootstrap; |
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66 extern AudioBootStrap MINTAUDIO_DMA8_bootstrap; |
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67 extern AudioBootStrap DISKAUD_bootstrap; |
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68 extern AudioBootStrap DUMMYAUD_bootstrap; |
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69 extern AudioBootStrap DCAUD_bootstrap; |
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70 extern AudioBootStrap MMEAUDIO_bootstrap; |
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71 extern AudioBootStrap DART_bootstrap; |
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72 |
1190 | 73 |
0 | 74 /* Available audio drivers */ |
75 static AudioBootStrap *bootstrap[] = { | |
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76 #if SDL_AUDIO_DRIVER_BSD |
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77 &BSD_AUDIO_bootstrap, |
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78 #endif |
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79 #if SDL_AUDIO_DRIVER_OSS |
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80 &DSP_bootstrap, |
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81 &DMA_bootstrap, |
0 | 82 #endif |
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83 #if SDL_AUDIO_DRIVER_ALSA |
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84 &ALSA_bootstrap, |
0 | 85 #endif |
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86 #if SDL_AUDIO_DRIVER_QNXNTO |
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87 &QNXNTOAUDIO_bootstrap, |
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88 #endif |
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89 #if SDL_AUDIO_DRIVER_SUNAUDIO |
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90 &SUNAUDIO_bootstrap, |
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91 #endif |
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92 #if SDL_AUDIO_DRIVER_DMEDIA |
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93 &DMEDIA_bootstrap, |
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94 #endif |
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95 #if SDL_AUDIO_DRIVER_ARTS |
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96 &ARTS_bootstrap, |
0 | 97 #endif |
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98 #if SDL_AUDIO_DRIVER_ESD |
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99 &ESD_bootstrap, |
0 | 100 #endif |
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101 #if SDL_AUDIO_DRIVER_NAS |
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102 &NAS_bootstrap, |
0 | 103 #endif |
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104 #if SDL_AUDIO_DRIVER_DSOUND |
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105 &DSOUND_bootstrap, |
0 | 106 #endif |
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107 #if SDL_AUDIO_DRIVER_WINWAVEOUT |
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108 &WINWAVEOUT_bootstrap, |
0 | 109 #endif |
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110 #if SDL_AUDIO_DRIVER_PAUDIO |
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111 &PAUDIO_bootstrap, |
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112 #endif |
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113 #if SDL_AUDIO_DRIVER_BEOSAUDIO |
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114 &BEOSAUDIO_bootstrap, |
0 | 115 #endif |
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116 #if SDL_AUDIO_DRIVER_COREAUDIO |
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117 &COREAUDIO_bootstrap, |
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118 #endif |
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119 #if SDL_AUDIO_DRIVER_SNDMGR |
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120 &SNDMGR_bootstrap, |
0 | 121 #endif |
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122 #if SDL_AUDIO_DRIVER_MINT |
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123 &MINTAUDIO_GSXB_bootstrap, |
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124 &MINTAUDIO_MCSN_bootstrap, |
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125 &MINTAUDIO_STFA_bootstrap, |
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126 &MINTAUDIO_XBIOS_bootstrap, |
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127 &MINTAUDIO_DMA8_bootstrap, |
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128 #endif |
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129 #if SDL_AUDIO_DRIVER_DISK |
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130 &DISKAUD_bootstrap, |
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131 #endif |
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132 #if SDL_AUDIO_DRIVER_DUMMY |
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133 &DUMMYAUD_bootstrap, |
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134 #endif |
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135 #if SDL_AUDIO_DRIVER_DC |
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136 &DCAUD_bootstrap, |
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137 #endif |
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138 #if SDL_AUDIO_DRIVER_MMEAUDIO |
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139 &MMEAUDIO_bootstrap, |
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140 #endif |
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141 #if SDL_AUDIO_DRIVER_DART |
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142 &DART_bootstrap, |
1190 | 143 #endif |
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144 NULL |
0 | 145 }; |
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146 |
2060 | 147 static SDL_AudioDevice * |
148 get_audio_device(SDL_AudioDeviceID id) | |
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149 { |
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150 id--; |
2060 | 151 if ((id >= SDL_arraysize(open_devices)) || (open_devices[id] == NULL)) { |
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152 SDL_SetError("Invalid audio device ID"); |
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153 return NULL; |
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154 } |
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155 |
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156 return open_devices[id]; |
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157 } |
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158 |
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159 |
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160 /* stubs for audio drivers that don't need a specific entry point... */ |
2060 | 161 static int |
162 SDL_AudioDetectDevices_Default(int iscapture) | |
163 { | |
164 return -1; | |
165 } | |
166 static void | |
167 SDL_AudioThreadInit_Default(_THIS) | |
168 { /* no-op. */ | |
169 } | |
170 static void | |
171 SDL_AudioWaitDevice_Default(_THIS) | |
172 { /* no-op. */ | |
173 } | |
174 static void | |
175 SDL_AudioPlayDevice_Default(_THIS) | |
176 { /* no-op. */ | |
177 } | |
178 static Uint8 * | |
179 SDL_AudioGetDeviceBuf_Default(_THIS) | |
180 { | |
181 return NULL; | |
182 } | |
183 static void | |
184 SDL_AudioWaitDone_Default(_THIS) | |
185 { /* no-op. */ | |
186 } | |
187 static void | |
188 SDL_AudioCloseDevice_Default(_THIS) | |
189 { /* no-op. */ | |
190 } | |
191 static void | |
192 SDL_AudioDeinitialize_Default(void) | |
193 { /* no-op. */ | |
194 } | |
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195 |
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196 static int |
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197 SDL_AudioOpenDevice_Default(_THIS, const char *devname, int iscapture) |
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198 { |
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199 return 0; |
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200 } |
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201 |
2060 | 202 static const char * |
203 SDL_AudioGetDeviceName_Default(int index, int iscapture) | |
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204 { |
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205 SDL_SetError("No such device"); |
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206 return NULL; |
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207 } |
0 | 208 |
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209 static void |
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210 SDL_AudioLockDevice_Default(SDL_AudioDevice * device) |
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211 { |
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212 if (device->thread && (SDL_ThreadID() == device->threadid)) { |
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213 return; |
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214 } |
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215 SDL_mutexP(device->mixer_lock); |
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216 } |
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217 |
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218 static void |
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219 SDL_AudioUnlockDevice_Default(SDL_AudioDevice * device) |
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220 { |
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221 if (device->thread && (SDL_ThreadID() == device->threadid)) { |
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222 return; |
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223 } |
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224 SDL_mutexV(device->mixer_lock); |
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225 } |
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226 |
0 | 227 |
2060 | 228 static void |
229 finalize_audio_entry_points(void) | |
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230 { |
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231 /* |
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232 * Fill in stub functions for unused driver entry points. This lets us |
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233 * blindly call them without having to check for validity first. |
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234 */ |
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235 |
2060 | 236 #define FILL_STUB(x) \ |
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237 if (current_audio.impl.x == NULL) { \ |
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238 current_audio.impl.x = SDL_Audio##x##_Default; \ |
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239 } |
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240 FILL_STUB(DetectDevices); |
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241 FILL_STUB(GetDeviceName); |
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242 FILL_STUB(OpenDevice); |
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243 FILL_STUB(ThreadInit); |
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244 FILL_STUB(WaitDevice); |
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245 FILL_STUB(PlayDevice); |
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246 FILL_STUB(GetDeviceBuf); |
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247 FILL_STUB(WaitDone); |
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248 FILL_STUB(CloseDevice); |
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249 FILL_STUB(LockDevice); |
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250 FILL_STUB(UnlockDevice); |
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251 FILL_STUB(Deinitialize); |
2060 | 252 #undef FILL_STUB |
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253 } |
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254 |
0 | 255 |
256 /* The general mixing thread function */ | |
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257 int SDLCALL |
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258 SDL_RunAudio(void *devicep) |
0 | 259 { |
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260 SDL_AudioDevice *device = (SDL_AudioDevice *) devicep; |
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261 Uint8 *stream; |
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262 int stream_len; |
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263 void *udata; |
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264 void (SDLCALL * fill) (void *userdata, Uint8 * stream, int len); |
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265 int silence; |
0 | 266 |
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267 /* Perform any thread setup */ |
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268 device->threadid = SDL_ThreadID(); |
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269 current_audio.impl.ThreadInit(device); |
0 | 270 |
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271 /* Set up the mixing function */ |
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272 fill = device->spec.callback; |
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273 udata = device->spec.userdata; |
21
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274 |
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275 if (device->convert.needed) { |
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276 if (device->convert.src_format == AUDIO_U8) { |
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277 silence = 0x80; |
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278 } else { |
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279 silence = 0; |
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280 } |
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281 stream_len = device->convert.len; |
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282 } else { |
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283 silence = device->spec.silence; |
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284 stream_len = device->spec.size; |
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285 } |
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286 |
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287 /* Loop, filling the audio buffers */ |
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288 while (device->enabled) { |
0 | 289 |
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290 /* Fill the current buffer with sound */ |
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291 if (device->convert.needed) { |
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292 if (device->convert.buf) { |
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293 stream = device->convert.buf; |
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294 } else { |
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295 continue; |
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296 } |
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297 } else { |
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298 stream = current_audio.impl.GetDeviceBuf(device); |
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299 if (stream == NULL) { |
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300 stream = device->fake_stream; |
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301 } |
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302 } |
0 | 303 |
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304 if (!device->paused) { |
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305 SDL_mutexP(device->mixer_lock); |
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306 (*fill) (udata, stream, stream_len); |
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307 SDL_mutexV(device->mixer_lock); |
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308 } |
0 | 309 |
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310 /* Convert the audio if necessary */ |
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311 if (device->convert.needed) { |
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312 SDL_ConvertAudio(&device->convert); |
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313 stream = current_audio.impl.GetDeviceBuf(device); |
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314 if (stream == NULL) { |
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315 stream = device->fake_stream; |
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316 } |
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317 SDL_memcpy(stream, device->convert.buf, device->convert.len_cvt); |
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318 } |
0 | 319 |
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320 /* Ready current buffer for play and change current buffer */ |
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321 if (stream != device->fake_stream) { |
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322 current_audio.impl.PlayDevice(device); |
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323 } |
1562 | 324 |
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325 /* Wait for an audio buffer to become available */ |
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326 if (stream == device->fake_stream) { |
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327 SDL_Delay((device->spec.samples * 1000) / device->spec.freq); |
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328 } else { |
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329 current_audio.impl.WaitDevice(device); |
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330 } |
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331 } |
1562 | 332 |
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333 /* Wait for the audio to drain.. */ |
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334 current_audio.impl.WaitDone(device); |
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335 |
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336 return (0); |
0 | 337 } |
338 | |
322
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339 |
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340 static SDL_AudioFormat |
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341 SDL_ParseAudioFormat(const char *string) |
1794 | 342 { |
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343 #define CHECK_FMT_STRING(x) if (SDL_strcmp(string, #x) == 0) return AUDIO_##x |
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344 CHECK_FMT_STRING(U8); |
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345 CHECK_FMT_STRING(S8); |
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346 CHECK_FMT_STRING(U16LSB); |
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347 CHECK_FMT_STRING(S16LSB); |
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348 CHECK_FMT_STRING(U16MSB); |
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349 CHECK_FMT_STRING(S16MSB); |
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350 CHECK_FMT_STRING(U16SYS); |
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351 CHECK_FMT_STRING(S16SYS); |
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352 CHECK_FMT_STRING(U16); |
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353 CHECK_FMT_STRING(S16); |
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354 CHECK_FMT_STRING(S32LSB); |
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355 CHECK_FMT_STRING(S32MSB); |
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356 CHECK_FMT_STRING(S32SYS); |
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357 CHECK_FMT_STRING(S32); |
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358 CHECK_FMT_STRING(F32LSB); |
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359 CHECK_FMT_STRING(F32MSB); |
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360 CHECK_FMT_STRING(F32SYS); |
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361 CHECK_FMT_STRING(F32); |
2060 | 362 #undef CHECK_FMT_STRING |
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363 return 0; |
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364 } |
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365 |
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366 int |
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367 SDL_GetNumAudioDrivers(void) |
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368 { |
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369 return (SDL_arraysize(bootstrap) - 1); |
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370 } |
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371 |
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372 const char * |
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373 SDL_GetAudioDriver(int index) |
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374 { |
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375 if (index >= 0 && index < SDL_GetNumAudioDrivers()) { |
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376 return (bootstrap[index]->name); |
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377 } |
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378 return (NULL); |
1794 | 379 } |
380 | |
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381 int |
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382 SDL_AudioInit(const char *driver_name) |
0 | 383 { |
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384 int i = 0; |
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385 int initialized = 0; |
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386 int tried_to_init = 0; |
0 | 387 |
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388 if (SDL_WasInit(SDL_INIT_AUDIO)) { |
2060 | 389 SDL_AudioQuit(); /* shutdown driver if already running. */ |
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390 } |
0 | 391 |
2060 | 392 SDL_memset(¤t_audio, '\0', sizeof(current_audio)); |
393 SDL_memset(open_devices, '\0', sizeof(open_devices)); | |
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394 |
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395 /* Select the proper audio driver */ |
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396 if (driver_name == NULL) { |
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397 driver_name = SDL_getenv("SDL_AUDIODRIVER"); |
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398 } |
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399 |
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400 for (i = 0; (!initialized) && (bootstrap[i]); ++i) { |
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401 /* make sure we should even try this driver before doing so... */ |
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402 const AudioBootStrap *backend = bootstrap[i]; |
2060 | 403 if (((driver_name) && (SDL_strcasecmp(backend->name, driver_name))) || |
404 ((!driver_name) && (backend->demand_only))) { | |
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405 continue; |
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406 } |
0 | 407 |
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408 tried_to_init = 1; |
2060 | 409 SDL_memset(¤t_audio, 0, sizeof(current_audio)); |
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410 current_audio.name = backend->name; |
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411 current_audio.desc = backend->desc; |
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412 initialized = backend->init(¤t_audio.impl); |
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413 } |
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414 |
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415 if (!initialized) { |
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416 /* specific drivers will set the error message if they fail... */ |
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417 if (!tried_to_init) { |
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418 if (driver_name) { |
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419 SDL_SetError("%s not available", driver_name); |
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420 } else { |
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421 SDL_SetError("No available audio device"); |
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422 } |
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423 } |
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424 |
2060 | 425 SDL_memset(¤t_audio, 0, sizeof(current_audio)); |
426 return (-1); /* No driver was available, so fail. */ | |
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427 } |
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428 |
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429 finalize_audio_entry_points(); |
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430 |
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431 return (0); |
0 | 432 } |
433 | |
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434 /* |
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435 * Get the current audio driver name |
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436 */ |
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437 const char * |
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438 SDL_GetCurrentAudioDriver() |
0 | 439 { |
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440 return current_audio.name; |
0 | 441 } |
442 | |
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443 |
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444 int |
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445 SDL_GetNumAudioDevices(int iscapture) |
0 | 446 { |
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447 if (!SDL_WasInit(SDL_INIT_AUDIO)) { |
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448 return -1; |
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449 } |
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450 if ((iscapture) && (!current_audio.impl.HasCaptureSupport)) { |
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451 return 0; |
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452 } |
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453 |
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454 if ((iscapture) && (current_audio.impl.OnlyHasDefaultInputDevice)) { |
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455 return 1; |
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456 } |
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457 |
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458 if ((!iscapture) && (current_audio.impl.OnlyHasDefaultOutputDevice)) { |
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459 return 1; |
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460 } |
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461 |
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462 return current_audio.impl.DetectDevices(iscapture); |
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463 } |
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464 |
0 | 465 |
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466 const char * |
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467 SDL_GetAudioDeviceName(int index, int iscapture) |
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468 { |
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469 if (!SDL_WasInit(SDL_INIT_AUDIO)) { |
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470 SDL_SetError("Audio subsystem is not initialized"); |
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471 return NULL; |
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472 } |
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473 |
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474 if ((iscapture) && (!current_audio.impl.HasCaptureSupport)) { |
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475 SDL_SetError("No capture support"); |
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476 return NULL; |
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477 } |
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478 |
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479 if (index < 0) { |
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480 SDL_SetError("No such device"); |
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481 return NULL; |
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482 } |
0 | 483 |
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484 if ((iscapture) && (current_audio.impl.OnlyHasDefaultInputDevice)) { |
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485 return DEFAULT_INPUT_DEVNAME; |
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486 } |
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487 |
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488 if ((!iscapture) && (current_audio.impl.OnlyHasDefaultOutputDevice)) { |
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489 return DEFAULT_OUTPUT_DEVNAME; |
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490 } |
262
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491 |
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492 return current_audio.impl.GetDeviceName(index, iscapture); |
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493 } |
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494 |
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495 |
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496 static void |
2060 | 497 close_audio_device(SDL_AudioDevice * device) |
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498 { |
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499 device->enabled = 0; |
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500 if (device->thread != NULL) { |
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501 SDL_WaitThread(device->thread, NULL); |
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502 } |
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503 if (device->mixer_lock != NULL) { |
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504 SDL_DestroyMutex(device->mixer_lock); |
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505 } |
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506 if (device->fake_stream != NULL) { |
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507 SDL_FreeAudioMem(device->fake_stream); |
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508 } |
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509 if (device->convert.needed) { |
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510 SDL_FreeAudioMem(device->convert.buf); |
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511 } |
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512 if (device->opened) { |
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513 current_audio.impl.CloseDevice(device); |
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514 device->opened = 0; |
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515 } |
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516 SDL_FreeAudioMem(device); |
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517 } |
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518 |
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519 |
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520 /* |
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521 * Sanity check desired AudioSpec for SDL_OpenAudio() in (orig). |
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522 * Fills in a sanitized copy in (prepared). |
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523 * Returns non-zero if okay, zero on fatal parameters in (orig). |
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524 */ |
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525 static int |
2060 | 526 prepare_audiospec(const SDL_AudioSpec * orig, SDL_AudioSpec * prepared) |
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527 { |
2060 | 528 SDL_memcpy(prepared, orig, sizeof(SDL_AudioSpec)); |
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529 |
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530 if (orig->callback == NULL) { |
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531 SDL_SetError("SDL_OpenAudio() passed a NULL callback"); |
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532 return 0; |
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533 } |
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534 |
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535 if (orig->freq == 0) { |
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536 const char *env = SDL_getenv("SDL_AUDIO_FREQUENCY"); |
2060 | 537 if ((!env) || ((prepared->freq = SDL_atoi(env)) == 0)) { |
538 prepared->freq = 22050; /* a reasonable default */ | |
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539 } |
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540 } |
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541 |
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542 if (orig->format == 0) { |
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543 const char *env = SDL_getenv("SDL_AUDIO_FORMAT"); |
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544 if ((!env) || ((prepared->format = SDL_ParseAudioFormat(env)) == 0)) { |
2060 | 545 prepared->format = AUDIO_S16; /* a reasonable default */ |
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546 } |
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547 } |
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548 |
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549 switch (orig->channels) { |
2060 | 550 case 0:{ |
551 const char *env = SDL_getenv("SDL_AUDIO_CHANNELS"); | |
2141 | 552 if ((!env) || ((prepared->channels = (Uint8) SDL_atoi(env)) == 0)) { |
2060 | 553 prepared->channels = 2; /* a reasonable default */ |
554 } | |
555 break; | |
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556 } |
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557 case 1: /* Mono */ |
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558 case 2: /* Stereo */ |
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559 case 4: /* surround */ |
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560 case 6: /* surround with center and lfe */ |
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561 break; |
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562 default: |
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563 SDL_SetError("Unsupported number of audio channels."); |
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564 return 0; |
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565 } |
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566 |
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567 if (orig->samples == 0) { |
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568 const char *env = SDL_getenv("SDL_AUDIO_SAMPLES"); |
2060 | 569 if ((!env) || ((prepared->samples = (Uint16) SDL_atoi(env)) == 0)) { |
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570 /* Pick a default of ~46 ms at desired frequency */ |
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571 /* !!! FIXME: remove this when the non-Po2 resampling is in. */ |
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572 const int samples = (prepared->freq / 1000) * 46; |
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573 int power2 = 1; |
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574 while (power2 < samples) { |
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575 power2 *= 2; |
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576 } |
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577 prepared->samples = power2; |
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578 } |
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579 } |
0 | 580 |
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581 /* Calculate the silence and size of the audio specification */ |
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582 SDL_CalculateAudioSpec(prepared); |
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583 |
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584 return 1; |
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585 } |
1408
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586 |
21
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587 |
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588 static SDL_AudioDeviceID |
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589 open_audio_device(const char *devname, int iscapture, |
2060 | 590 const SDL_AudioSpec * _desired, SDL_AudioSpec * obtained, |
591 int min_id) | |
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592 { |
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593 SDL_AudioDeviceID id = 0; |
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594 SDL_AudioSpec desired; |
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595 SDL_AudioDevice *device; |
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596 int i = 0; |
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597 |
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598 if (!SDL_WasInit(SDL_INIT_AUDIO)) { |
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599 SDL_SetError("Audio subsystem is not initialized"); |
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600 return 0; |
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601 } |
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602 |
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603 if ((iscapture) && (!current_audio.impl.HasCaptureSupport)) { |
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604 SDL_SetError("No capture support"); |
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605 return 0; |
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606 } |
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607 |
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608 if (!prepare_audiospec(_desired, &desired)) { |
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609 return 0; |
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610 } |
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611 |
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612 /* If app doesn't care about a specific device, let the user override. */ |
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613 if (devname == NULL) { |
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614 devname = SDL_getenv("SDL_AUDIO_DEVICE_NAME"); |
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615 } |
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616 |
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617 /* |
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618 * Catch device names at the high level for the simple case... |
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619 * This lets us have a basic "device enumeration" for systems that |
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620 * don't have multiple devices, but makes sure the device name is |
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621 * always NULL when it hits the low level. |
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622 * |
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623 * Also make sure that the simple case prevents multiple simultaneous |
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624 * opens of the default system device. |
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625 */ |
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626 |
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627 if ((iscapture) && (current_audio.impl.OnlyHasDefaultInputDevice)) { |
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628 if ((devname) && (SDL_strcmp(devname, DEFAULT_INPUT_DEVNAME) != 0)) { |
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629 SDL_SetError("No such device"); |
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630 return 0; |
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631 } |
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632 devname = NULL; |
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|
633 |
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|
634 for (i = 0; i < SDL_arraysize(open_devices); i++) { |
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|
635 if ((open_devices[i]) && (open_devices[i]->iscapture)) { |
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|
636 SDL_SetError("Audio device already open"); |
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637 return 0; |
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|
638 } |
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|
639 } |
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|
640 } |
5f6550e5184f
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|
641 |
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642 if ((!iscapture) && (current_audio.impl.OnlyHasDefaultOutputDevice)) { |
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|
643 if ((devname) && (SDL_strcmp(devname, DEFAULT_OUTPUT_DEVNAME) != 0)) { |
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644 SDL_SetError("No such device"); |
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|
645 return 0; |
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646 } |
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647 devname = NULL; |
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|
648 |
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649 for (i = 0; i < SDL_arraysize(open_devices); i++) { |
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650 if ((open_devices[i]) && (!open_devices[i]->iscapture)) { |
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|
651 SDL_SetError("Audio device already open"); |
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652 return 0; |
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|
653 } |
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|
654 } |
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|
655 } |
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656 |
2060 | 657 device = (SDL_AudioDevice *) SDL_AllocAudioMem(sizeof(SDL_AudioDevice)); |
2049
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|
658 if (device == NULL) { |
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|
659 SDL_OutOfMemory(); |
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|
660 return 0; |
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|
661 } |
2060 | 662 SDL_memset(device, '\0', sizeof(SDL_AudioDevice)); |
663 SDL_memcpy(&device->spec, &desired, sizeof(SDL_AudioSpec)); | |
2049
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|
664 device->enabled = 1; |
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|
665 device->paused = 1; |
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|
666 device->iscapture = iscapture; |
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|
667 |
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|
668 /* Create a semaphore for locking the sound buffers */ |
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|
669 if (!current_audio.impl.SkipMixerLock) { |
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|
670 device->mixer_lock = SDL_CreateMutex(); |
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|
671 if (device->mixer_lock == NULL) { |
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|
672 close_audio_device(device); |
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|
673 SDL_SetError("Couldn't create mixer lock"); |
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|
674 return 0; |
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|
675 } |
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|
676 } |
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|
677 |
5f6550e5184f
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|
678 if (!current_audio.impl.OpenDevice(device, devname, iscapture)) { |
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|
679 close_audio_device(device); |
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|
680 return 0; |
5f6550e5184f
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|
681 } |
5f6550e5184f
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|
682 device->opened = 1; |
0 | 683 |
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|
684 /* If the audio driver changes the buffer size, accept it */ |
2049
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|
685 if (device->spec.samples != desired.samples) { |
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|
686 desired.samples = device->spec.samples; |
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|
687 SDL_CalculateAudioSpec(&device->spec); |
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|
688 } |
0 | 689 |
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|
690 /* Allocate a fake audio memory buffer */ |
2049
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diff
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|
691 device->fake_stream = SDL_AllocAudioMem(device->spec.size); |
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|
692 if (device->fake_stream == NULL) { |
5f6550e5184f
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|
693 close_audio_device(device); |
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diff
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|
694 SDL_OutOfMemory(); |
2049
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|
695 return 0; |
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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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|
696 } |
0 | 697 |
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|
698 /* See if we need to do any conversion */ |
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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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|
699 if (obtained != NULL) { |
2049
5f6550e5184f
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parents:
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diff
changeset
|
700 SDL_memcpy(obtained, &device->spec, sizeof(SDL_AudioSpec)); |
5f6550e5184f
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diff
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|
701 } else if (desired.freq != device->spec.freq || |
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Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents:
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diff
changeset
|
702 desired.format != device->spec.format || |
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parents:
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|
703 desired.channels != device->spec.channels) { |
1895
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diff
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|
704 /* Build an audio conversion block */ |
2049
5f6550e5184f
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parents:
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diff
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|
705 if (SDL_BuildAudioCVT(&device->convert, |
5f6550e5184f
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2045
diff
changeset
|
706 desired.format, desired.channels, |
5f6550e5184f
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diff
changeset
|
707 desired.freq, |
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|
708 device->spec.format, device->spec.channels, |
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changeset
|
709 device->spec.freq) < 0) { |
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|
710 close_audio_device(device); |
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|
711 return 0; |
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|
712 } |
2049
5f6550e5184f
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|
713 if (device->convert.needed) { |
2060 | 714 device->convert.len = (int) (((double) desired.size) / |
715 device->convert.len_ratio); | |
2053
716cf90f24a0
1.3 branch version of revision 2878.
Ryan C. Gordon <icculus@icculus.org>
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2049
diff
changeset
|
716 |
2049
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changeset
|
717 device->convert.buf = |
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|
718 (Uint8 *) SDL_AllocAudioMem(device->convert.len * |
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parents:
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|
719 device->convert.len_mult); |
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|
720 if (device->convert.buf == NULL) { |
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|
721 close_audio_device(device); |
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|
722 SDL_OutOfMemory(); |
2049
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|
723 return 0; |
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|
724 } |
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|
725 } |
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|
726 } |
2049
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|
727 |
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|
728 /* Find an available device ID and store the structure... */ |
2060 | 729 for (id = min_id - 1; id < SDL_arraysize(open_devices); id++) { |
2049
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|
730 if (open_devices[id] == NULL) { |
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parents:
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|
731 open_devices[id] = device; |
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parents:
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changeset
|
732 break; |
5f6550e5184f
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changeset
|
733 } |
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Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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|
734 } |
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parents:
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changeset
|
735 |
5f6550e5184f
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|
736 if (id == SDL_arraysize(open_devices)) { |
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diff
changeset
|
737 SDL_SetError("Too many open audio devices"); |
5f6550e5184f
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Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
738 close_audio_device(device); |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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changeset
|
739 return 0; |
5f6550e5184f
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parents:
2045
diff
changeset
|
740 } |
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741 |
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|
742 /* Start the audio thread if necessary */ |
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743 if (!current_audio.impl.ProvidesOwnCallbackThread) { |
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744 /* Start the audio thread */ |
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|
745 /* !!! FIXME: this is nasty. */ |
1402
d910939febfa
Use consistent identifiers for the various platforms we support.
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diff
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|
746 #if (defined(__WIN32__) && !defined(_WIN32_WCE)) && !defined(HAVE_LIBC) |
1330
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|
747 #undef SDL_CreateThread |
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748 device->thread = SDL_CreateThread(SDL_RunAudio, device, NULL, NULL); |
1330
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749 #else |
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750 device->thread = SDL_CreateThread(SDL_RunAudio, device); |
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751 #endif |
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|
752 if (device->thread == NULL) { |
2060 | 753 SDL_CloseAudioDevice(id + 1); |
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754 SDL_SetError("Couldn't create audio thread"); |
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|
755 return 0; |
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756 } |
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|
757 } |
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|
758 |
2060 | 759 return id + 1; |
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|
760 } |
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761 |
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|
762 |
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|
763 int |
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|
764 SDL_OpenAudio(const SDL_AudioSpec * desired, SDL_AudioSpec * obtained) |
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765 { |
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766 SDL_AudioDeviceID id = 0; |
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767 |
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768 /* Start up the audio driver, if necessary. This is legacy behaviour! */ |
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|
769 if (!SDL_WasInit(SDL_INIT_AUDIO)) { |
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770 if (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) { |
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771 return (-1); |
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|
772 } |
2049
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773 } |
0 | 774 |
2049
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775 /* SDL_OpenAudio() is legacy and can only act on Device ID #1. */ |
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|
776 if (open_devices[0] != NULL) { |
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|
777 SDL_SetError("Audio device is already opened"); |
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778 return (-1); |
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779 } |
2049
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|
780 |
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781 id = open_audio_device(NULL, 0, desired, obtained, 1); |
2060 | 782 if (id > 1) { /* this should never happen in theory... */ |
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783 SDL_CloseAudioDevice(id); |
2060 | 784 SDL_SetError("Internal error"); /* MUST be Device ID #1! */ |
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|
785 return (-1); |
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786 } |
21
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|
787 |
2049
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788 return ((id == 0) ? -1 : 0); |
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789 } |
21
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|
790 |
2049
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791 SDL_AudioDeviceID |
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792 SDL_OpenAudioDevice(const char *device, int iscapture, |
2060 | 793 const SDL_AudioSpec * desired, SDL_AudioSpec * obtained) |
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794 { |
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795 return open_audio_device(device, iscapture, desired, obtained, 2); |
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796 } |
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797 |
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798 SDL_audiostatus |
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799 SDL_GetAudioDeviceStatus(SDL_AudioDeviceID devid) |
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800 { |
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801 SDL_AudioDevice *device = get_audio_device(devid); |
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802 SDL_audiostatus status = SDL_AUDIO_STOPPED; |
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803 if (device && device->enabled) { |
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804 if (device->paused) { |
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805 status = SDL_AUDIO_PAUSED; |
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806 } else { |
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807 status = SDL_AUDIO_PLAYING; |
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808 } |
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809 } |
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|
810 return (status); |
0 | 811 } |
812 | |
2049
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|
813 |
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|
814 SDL_audiostatus |
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|
815 SDL_GetAudioStatus(void) |
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816 { |
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817 return SDL_GetAudioDeviceStatus(1); |
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818 } |
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|
819 |
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|
820 void |
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821 SDL_PauseAudioDevice(SDL_AudioDeviceID devid, int pause_on) |
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822 { |
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823 SDL_AudioDevice *device = get_audio_device(devid); |
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|
824 if (device) { |
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825 device->paused = pause_on; |
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826 } |
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827 } |
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828 |
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829 void |
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830 SDL_PauseAudio(int pause_on) |
0 | 831 { |
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832 SDL_PauseAudioDevice(1, pause_on); |
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833 } |
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834 |
0 | 835 |
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836 void |
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837 SDL_LockAudioDevice(SDL_AudioDeviceID devid) |
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838 { |
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839 /* Obtain a lock on the mixing buffers */ |
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840 SDL_AudioDevice *device = get_audio_device(devid); |
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841 if (device) { |
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842 current_audio.impl.LockDevice(device); |
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843 } |
0 | 844 } |
845 | |
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846 void |
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847 SDL_LockAudio(void) |
0 | 848 { |
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849 SDL_LockAudioDevice(1); |
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850 } |
0 | 851 |
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852 void |
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853 SDL_UnlockAudioDevice(SDL_AudioDeviceID devid) |
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854 { |
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855 /* Obtain a lock on the mixing buffers */ |
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Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
856 SDL_AudioDevice *device = get_audio_device(devid); |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
857 if (device) { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
858 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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diff
changeset
|
859 } |
0 | 860 } |
861 | |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
862 void |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
863 SDL_UnlockAudio(void) |
0 | 864 { |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
865 SDL_UnlockAudioDevice(1); |
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
|
866 } |
0 | 867 |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
868 void |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
869 SDL_CloseAudioDevice(SDL_AudioDeviceID devid) |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
870 { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
871 SDL_AudioDevice *device = get_audio_device(devid); |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
872 if (device) { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
873 close_audio_device(device); |
2060 | 874 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.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
875 } |
0 | 876 } |
877 | |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
878 void |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
879 SDL_CloseAudio(void) |
0 | 880 { |
2049
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_CloseAudioDevice(1); |
0 | 882 } |
883 | |
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
|
884 void |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
885 SDL_AudioQuit(void) |
0 | 886 { |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
887 SDL_AudioDeviceID i; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
888 for (i = 0; i < SDL_arraysize(open_devices); i++) { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents:
2045
diff
changeset
|
889 SDL_CloseAudioDevice(i); |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
890 } |
0 | 891 |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
892 /* Free the driver data */ |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents:
2045
diff
changeset
|
893 current_audio.impl.Deinitialize(); |
2060 | 894 SDL_memset(¤t_audio, '\0', sizeof(current_audio)); |
895 SDL_memset(open_devices, '\0', sizeof(open_devices)); | |
0 | 896 } |
897 | |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
898 #define NUM_FORMATS 10 |
0 | 899 static int format_idx; |
900 static int format_idx_sub; | |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
901 static SDL_AudioFormat format_list[NUM_FORMATS][NUM_FORMATS] = { |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
902 {AUDIO_U8, AUDIO_S8, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
903 AUDIO_U16MSB, AUDIO_S32LSB, AUDIO_S32MSB, AUDIO_F32LSB, AUDIO_F32MSB}, |
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
|
904 {AUDIO_S8, AUDIO_U8, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
905 AUDIO_U16MSB, AUDIO_S32LSB, AUDIO_S32MSB, AUDIO_F32LSB, AUDIO_F32MSB}, |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
906 {AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_S32LSB, |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
907 AUDIO_S32MSB, AUDIO_F32LSB, AUDIO_F32MSB, AUDIO_U8, AUDIO_S8}, |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
908 {AUDIO_S16MSB, AUDIO_S16LSB, AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_S32MSB, |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
909 AUDIO_S32LSB, AUDIO_F32MSB, AUDIO_F32LSB, AUDIO_U8, AUDIO_S8}, |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
910 {AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_S32LSB, |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
911 AUDIO_S32MSB, AUDIO_F32LSB, AUDIO_F32MSB, AUDIO_U8, AUDIO_S8}, |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
912 {AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_S16MSB, AUDIO_S16LSB, AUDIO_S32MSB, |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
913 AUDIO_S32LSB, AUDIO_F32MSB, AUDIO_F32LSB, AUDIO_U8, AUDIO_S8}, |
1993
7a3889fc9e5d
Reordered the favored audio format list a little.
Ryan C. Gordon <icculus@icculus.org>
parents:
1982
diff
changeset
|
914 {AUDIO_S32LSB, AUDIO_S32MSB, AUDIO_F32LSB, AUDIO_F32MSB, AUDIO_S16LSB, |
7a3889fc9e5d
Reordered the favored audio format list a little.
Ryan C. Gordon <icculus@icculus.org>
parents:
1982
diff
changeset
|
915 AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_U8, AUDIO_S8}, |
7a3889fc9e5d
Reordered the favored audio format list a little.
Ryan C. Gordon <icculus@icculus.org>
parents:
1982
diff
changeset
|
916 {AUDIO_S32MSB, AUDIO_S32LSB, AUDIO_F32MSB, AUDIO_F32LSB, AUDIO_S16MSB, |
7a3889fc9e5d
Reordered the favored audio format list a little.
Ryan C. Gordon <icculus@icculus.org>
parents:
1982
diff
changeset
|
917 AUDIO_S16LSB, AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_U8, AUDIO_S8}, |
7a3889fc9e5d
Reordered the favored audio format list a little.
Ryan C. Gordon <icculus@icculus.org>
parents:
1982
diff
changeset
|
918 {AUDIO_F32LSB, AUDIO_F32MSB, AUDIO_S32LSB, AUDIO_S32MSB, AUDIO_S16LSB, |
7a3889fc9e5d
Reordered the favored audio format list a little.
Ryan C. Gordon <icculus@icculus.org>
parents:
1982
diff
changeset
|
919 AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_U8, AUDIO_S8}, |
7a3889fc9e5d
Reordered the favored audio format list a little.
Ryan C. Gordon <icculus@icculus.org>
parents:
1982
diff
changeset
|
920 {AUDIO_F32MSB, AUDIO_F32LSB, AUDIO_S32MSB, AUDIO_S32LSB, AUDIO_S16MSB, |
7a3889fc9e5d
Reordered the favored audio format list a little.
Ryan C. Gordon <icculus@icculus.org>
parents:
1982
diff
changeset
|
921 AUDIO_S16LSB, AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_U8, AUDIO_S8}, |
0 | 922 }; |
923 | |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
924 SDL_AudioFormat |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
925 SDL_FirstAudioFormat(SDL_AudioFormat format) |
0 | 926 { |
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
|
927 for (format_idx = 0; format_idx < NUM_FORMATS; ++format_idx) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
928 if (format_list[format_idx][0] == format) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
929 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
930 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
931 } |
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
|
932 format_idx_sub = 0; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
933 return (SDL_NextAudioFormat()); |
0 | 934 } |
935 | |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1978
diff
changeset
|
936 SDL_AudioFormat |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
937 SDL_NextAudioFormat(void) |
0 | 938 { |
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
|
939 if ((format_idx == NUM_FORMATS) || (format_idx_sub == NUM_FORMATS)) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
940 return (0); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
941 } |
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
|
942 return (format_list[format_idx][format_idx_sub++]); |
0 | 943 } |
944 | |
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
|
945 void |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
946 SDL_CalculateAudioSpec(SDL_AudioSpec * spec) |
0 | 947 { |
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
|
948 switch (spec->format) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
949 case AUDIO_U8: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
950 spec->silence = 0x80; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
951 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
952 default: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
953 spec->silence = 0x00; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
954 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
955 } |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
956 spec->size = SDL_AUDIO_BITSIZE(spec->format) / 8; |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
957 spec->size *= spec->channels; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1794
diff
changeset
|
958 spec->size *= spec->samples; |
0 | 959 } |
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
|
960 |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
961 |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
962 /* |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
963 * Moved here from SDL_mixer.c, since it relies on internals of an opened |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
964 * audio device (and is deprecated, by the way!). |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
965 */ |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
966 void |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
967 SDL_MixAudio(Uint8 * dst, const Uint8 * src, Uint32 len, int volume) |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
968 { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
969 /* Mix the user-level audio format */ |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
970 SDL_AudioDevice *device = get_audio_device(1); |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
971 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
|
972 SDL_AudioFormat format; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
973 if (device->convert.needed) { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
974 format = device->convert.src_format; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
975 } else { |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
976 format = device->spec.format; |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
977 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
978 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
|
979 } |
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 /* vi: set ts=4 sw=4 expandtab: */ |