Mercurial > sdl-ios-xcode
annotate src/audio/SDL_audio.c @ 3294:470d0a416aa7
Fixed bug #714
fuzzyTew@gmail.com 2009-03-14 15:18:45 PDT
patch to change HAVE_ICONV to HAVE_ICONV_H
There are two separate iconv checks in configure -- one for the header file and
one for the library. include/SDL_stdinc.h uses the library define to see
whether or not it should reference the types defined in the header, which
naturally breaks if the library exists and the header does not.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Mon, 21 Sep 2009 11:04:01 +0000 |
parents | 1ed5d432e468 |
children | 00fab0ebfe54 |
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 DISKAUD_bootstrap; |
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66 extern AudioBootStrap DUMMYAUD_bootstrap; |
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67 extern AudioBootStrap DCAUD_bootstrap; |
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68 extern AudioBootStrap MMEAUDIO_bootstrap; |
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69 extern AudioBootStrap DART_bootstrap; |
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70 extern AudioBootStrap NDSAUD_bootstrap; |
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71 extern AudioBootStrap FUSIONSOUND_bootstrap; |
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72 |
1190 | 73 |
0 | 74 /* Available audio drivers */ |
3162 | 75 static const AudioBootStrap *const 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_PULSEAUDIO |
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80 &PULSEAUDIO_bootstrap, |
0 | 81 #endif |
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82 #if SDL_AUDIO_DRIVER_ALSA |
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83 &ALSA_bootstrap, |
0 | 84 #endif |
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85 #if SDL_AUDIO_DRIVER_OSS |
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86 &DSP_bootstrap, |
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87 &DMA_bootstrap, |
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88 #endif |
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89 #if SDL_AUDIO_DRIVER_QSA |
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90 &QSAAUDIO_bootstrap, |
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91 #endif |
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92 #if SDL_AUDIO_DRIVER_SUNAUDIO |
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93 &SUNAUDIO_bootstrap, |
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94 #endif |
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95 #if SDL_AUDIO_DRIVER_DMEDIA |
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96 &DMEDIA_bootstrap, |
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97 #endif |
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98 #if SDL_AUDIO_DRIVER_ARTS |
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99 &ARTS_bootstrap, |
0 | 100 #endif |
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101 #if SDL_AUDIO_DRIVER_ESD |
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102 &ESD_bootstrap, |
0 | 103 #endif |
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104 #if SDL_AUDIO_DRIVER_NAS |
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105 &NAS_bootstrap, |
0 | 106 #endif |
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107 #if SDL_AUDIO_DRIVER_DSOUND |
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108 &DSOUND_bootstrap, |
0 | 109 #endif |
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110 #if SDL_AUDIO_DRIVER_WINWAVEOUT |
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111 &WINWAVEOUT_bootstrap, |
0 | 112 #endif |
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113 #if SDL_AUDIO_DRIVER_PAUDIO |
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114 &PAUDIO_bootstrap, |
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115 #endif |
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116 #if SDL_AUDIO_DRIVER_BEOSAUDIO |
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117 &BEOSAUDIO_bootstrap, |
0 | 118 #endif |
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119 #if SDL_AUDIO_DRIVER_COREAUDIO |
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120 &COREAUDIO_bootstrap, |
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121 #endif |
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122 #if SDL_AUDIO_DRIVER_COREAUDIOIPHONE |
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123 &COREAUDIOIPHONE_bootstrap, |
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124 #endif |
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125 #if SDL_AUDIO_DRIVER_DISK |
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126 &DISKAUD_bootstrap, |
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127 #endif |
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128 #if SDL_AUDIO_DRIVER_DUMMY |
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129 &DUMMYAUD_bootstrap, |
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130 #endif |
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131 #if SDL_AUDIO_DRIVER_MMEAUDIO |
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132 &MMEAUDIO_bootstrap, |
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133 #endif |
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134 #if SDL_AUDIO_DRIVER_NDS |
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135 &NDSAUD_bootstrap, |
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136 #endif |
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137 #if SDL_AUDIO_DRIVER_FUSIONSOUND |
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138 &FUSIONSOUND_bootstrap, |
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139 #endif |
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140 NULL |
0 | 141 }; |
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142 |
2060 | 143 static SDL_AudioDevice * |
144 get_audio_device(SDL_AudioDeviceID id) | |
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145 { |
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146 id--; |
2060 | 147 if ((id >= SDL_arraysize(open_devices)) || (open_devices[id] == NULL)) { |
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148 SDL_SetError("Invalid audio device ID"); |
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149 return NULL; |
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150 } |
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151 |
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152 return open_devices[id]; |
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153 } |
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154 |
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155 |
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156 /* stubs for audio drivers that don't need a specific entry point... */ |
2060 | 157 static int |
158 SDL_AudioDetectDevices_Default(int iscapture) | |
159 { | |
160 return -1; | |
161 } | |
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162 |
2060 | 163 static void |
164 SDL_AudioThreadInit_Default(_THIS) | |
165 { /* no-op. */ | |
166 } | |
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167 |
2060 | 168 static void |
169 SDL_AudioWaitDevice_Default(_THIS) | |
170 { /* no-op. */ | |
171 } | |
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172 |
2060 | 173 static void |
174 SDL_AudioPlayDevice_Default(_THIS) | |
175 { /* no-op. */ | |
176 } | |
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177 |
2060 | 178 static Uint8 * |
179 SDL_AudioGetDeviceBuf_Default(_THIS) | |
180 { | |
181 return NULL; | |
182 } | |
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183 |
2060 | 184 static void |
185 SDL_AudioWaitDone_Default(_THIS) | |
186 { /* no-op. */ | |
187 } | |
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188 |
2060 | 189 static void |
190 SDL_AudioCloseDevice_Default(_THIS) | |
191 { /* no-op. */ | |
192 } | |
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193 |
2060 | 194 static void |
195 SDL_AudioDeinitialize_Default(void) | |
196 { /* no-op. */ | |
197 } | |
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198 |
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199 static int |
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200 SDL_AudioOpenDevice_Default(_THIS, const char *devname, int iscapture) |
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201 { |
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202 return 0; |
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203 } |
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204 |
2060 | 205 static const char * |
206 SDL_AudioGetDeviceName_Default(int index, int iscapture) | |
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207 { |
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208 SDL_SetError("No such device"); |
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209 return NULL; |
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210 } |
0 | 211 |
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212 static void |
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213 SDL_AudioLockDevice_Default(SDL_AudioDevice * device) |
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214 { |
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215 if (device->thread && (SDL_ThreadID() == device->threadid)) { |
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216 return; |
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217 } |
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218 SDL_mutexP(device->mixer_lock); |
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219 } |
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220 |
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221 static void |
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222 SDL_AudioUnlockDevice_Default(SDL_AudioDevice * device) |
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223 { |
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224 if (device->thread && (SDL_ThreadID() == device->threadid)) { |
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225 return; |
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226 } |
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227 SDL_mutexV(device->mixer_lock); |
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228 } |
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229 |
0 | 230 |
2060 | 231 static void |
232 finalize_audio_entry_points(void) | |
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233 { |
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234 /* |
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235 * Fill in stub functions for unused driver entry points. This lets us |
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236 * blindly call them without having to check for validity first. |
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237 */ |
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238 |
2060 | 239 #define FILL_STUB(x) \ |
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240 if (current_audio.impl.x == NULL) { \ |
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241 current_audio.impl.x = SDL_Audio##x##_Default; \ |
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242 } |
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243 FILL_STUB(DetectDevices); |
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244 FILL_STUB(GetDeviceName); |
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245 FILL_STUB(OpenDevice); |
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246 FILL_STUB(ThreadInit); |
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247 FILL_STUB(WaitDevice); |
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248 FILL_STUB(PlayDevice); |
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249 FILL_STUB(GetDeviceBuf); |
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250 FILL_STUB(WaitDone); |
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251 FILL_STUB(CloseDevice); |
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252 FILL_STUB(LockDevice); |
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253 FILL_STUB(UnlockDevice); |
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254 FILL_STUB(Deinitialize); |
2060 | 255 #undef FILL_STUB |
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256 } |
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257 |
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258 /* Streaming functions (for when the input and output buffer sizes are different) */ |
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259 /* Write [length] bytes from buf into the streamer */ |
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260 void |
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261 SDL_StreamWrite(SDL_AudioStreamer * stream, Uint8 * buf, int length) |
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262 { |
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263 int i; |
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264 |
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265 for (i = 0; i < length; ++i) { |
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266 stream->buffer[stream->write_pos] = buf[i]; |
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267 ++stream->write_pos; |
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268 } |
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269 } |
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270 |
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271 /* Read [length] bytes out of the streamer into buf */ |
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272 void |
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273 SDL_StreamRead(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 buf[i] = stream->buffer[stream->read_pos]; |
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279 ++stream->read_pos; |
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280 } |
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281 } |
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282 |
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283 int |
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284 SDL_StreamLength(SDL_AudioStreamer * stream) |
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285 { |
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286 return (stream->write_pos - stream->read_pos) % stream->max_len; |
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287 } |
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288 |
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289 /* Initialize the stream by allocating the buffer and setting the read/write heads to the beginning */ |
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290 int |
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291 SDL_StreamInit(SDL_AudioStreamer * stream, int max_len, Uint8 silence) |
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292 { |
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293 /* First try to allocate the buffer */ |
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294 stream->buffer = (Uint8 *) SDL_malloc(max_len); |
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295 if (stream->buffer == NULL) { |
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296 return -1; |
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297 } |
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298 |
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299 stream->max_len = max_len; |
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300 stream->read_pos = 0; |
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301 stream->write_pos = 0; |
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302 |
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303 /* Zero out the buffer */ |
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304 SDL_memset(stream->buffer, silence, max_len); |
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305 |
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306 return 0; |
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307 } |
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308 |
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309 /* Deinitialize the stream simply by freeing the buffer */ |
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310 void |
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311 SDL_StreamDeinit(SDL_AudioStreamer * stream) |
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312 { |
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313 if (stream->buffer != NULL) { |
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314 SDL_free(stream->buffer); |
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315 } |
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316 } |
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317 |
0 | 318 |
319 /* The general mixing thread function */ | |
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320 int SDLCALL |
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321 SDL_RunAudio(void *devicep) |
0 | 322 { |
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323 SDL_AudioDevice *device = (SDL_AudioDevice *) devicep; |
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324 Uint8 *stream; |
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325 int stream_len; |
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326 void *udata; |
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327 void (SDLCALL * fill) (void *userdata, Uint8 * stream, int len); |
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328 int silence; |
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329 |
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330 /* For streaming when the buffer sizes don't match up */ |
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331 Uint8 *istream; |
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332 int istream_len; |
0 | 333 |
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334 /* Perform any thread setup */ |
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335 device->threadid = SDL_ThreadID(); |
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336 current_audio.impl.ThreadInit(device); |
0 | 337 |
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338 /* Set up the mixing function */ |
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339 fill = device->spec.callback; |
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340 udata = device->spec.userdata; |
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341 |
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342 /* By default do not stream */ |
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343 device->use_streamer = 0; |
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344 |
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345 if (device->convert.needed) { |
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346 if (device->convert.src_format == AUDIO_U8) { |
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347 silence = 0x80; |
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348 } else { |
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349 silence = 0; |
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350 } |
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351 |
3040 | 352 #if 0 /* !!! FIXME: I took len_div out of the structure. Use rate_incr instead? */ |
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353 /* If the result of the conversion alters the length, i.e. resampling is being used, use the streamer */ |
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354 if (device->convert.len_mult != 1 || device->convert.len_div != 1) { |
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355 /* The streamer's maximum length should be twice whichever is larger: spec.size or len_cvt */ |
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356 stream_max_len = 2 * device->spec.size; |
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357 if (device->convert.len_mult > device->convert.len_div) { |
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358 stream_max_len *= device->convert.len_mult; |
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359 stream_max_len /= device->convert.len_div; |
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360 } |
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361 if (SDL_StreamInit(&device->streamer, stream_max_len, silence) < |
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362 0) |
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363 return -1; |
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364 device->use_streamer = 1; |
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365 |
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366 /* istream_len should be the length of what we grab from the callback and feed to conversion, |
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367 so that we get close to spec_size. I.e. we want device.spec_size = istream_len * u / d |
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368 */ |
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369 istream_len = |
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370 device->spec.size * device->convert.len_div / |
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371 device->convert.len_mult; |
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372 } |
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373 #endif |
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374 |
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375 /* stream_len = device->convert.len; */ |
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376 stream_len = device->spec.size; |
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377 } else { |
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378 silence = device->spec.silence; |
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379 stream_len = device->spec.size; |
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380 } |
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381 |
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382 /* Determine if the streamer is necessary here */ |
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383 if (device->use_streamer == 1) { |
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384 /* This code is almost the same as the old code. The difference is, instead of reding |
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385 directly from the callback into "stream", then converting and sending the audio off, |
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386 we go: callback -> "istream" -> (conversion) -> streamer -> stream -> device. |
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387 However, reading and writing with streamer are done separately: |
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388 - We only call the callback and write to the streamer when the streamer does not |
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389 contain enough samples to output to the device. |
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390 - We only read from the streamer and tell the device to play when the streamer |
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391 does have enough samples to output. |
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392 This allows us to perform resampling in the conversion step, where the output of the |
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393 resampling process can be any number. We will have to see what a good size for the |
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394 stream's maximum length is, but I suspect 2*max(len_cvt, stream_len) is a good figure. |
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395 */ |
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396 while (device->enabled) { |
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397 /* 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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398 if (SDL_StreamLength(&device->streamer) < stream_len) { |
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399 /* Set up istream */ |
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400 if (device->convert.needed) { |
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401 if (device->convert.buf) { |
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402 istream = device->convert.buf; |
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403 } else { |
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404 continue; |
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405 } |
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406 } else { |
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407 istream = current_audio.impl.GetDeviceBuf(device); |
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408 if (istream == NULL) { |
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409 istream = device->fake_stream; |
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410 } |
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411 } |
0 | 412 |
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413 /* Read from the callback into the _input_ stream */ |
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414 if (!device->paused) { |
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415 SDL_mutexP(device->mixer_lock); |
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416 (*fill) (udata, istream, istream_len); |
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417 SDL_mutexV(device->mixer_lock); |
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418 } |
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419 |
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420 /* Convert the audio if necessary and write to the streamer */ |
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421 if (device->convert.needed) { |
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422 SDL_ConvertAudio(&device->convert); |
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423 if (istream == NULL) { |
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424 istream = device->fake_stream; |
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425 } |
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426 /*SDL_memcpy(istream, device->convert.buf, device->convert.len_cvt); */ |
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427 SDL_StreamWrite(&device->streamer, device->convert.buf, |
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428 device->convert.len_cvt); |
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429 } else { |
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430 SDL_StreamWrite(&device->streamer, istream, istream_len); |
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431 } |
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432 } |
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433 |
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434 /* Only output audio if the streamer has enough to output */ |
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435 if (SDL_StreamLength(&device->streamer) >= stream_len) { |
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436 /* Set up the output stream */ |
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437 if (device->convert.needed) { |
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438 if (device->convert.buf) { |
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439 stream = device->convert.buf; |
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440 } else { |
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441 continue; |
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442 } |
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443 } else { |
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444 stream = current_audio.impl.GetDeviceBuf(device); |
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445 if (stream == NULL) { |
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446 stream = device->fake_stream; |
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447 } |
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448 } |
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449 |
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450 /* Now read from the streamer */ |
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451 SDL_StreamRead(&device->streamer, stream, stream_len); |
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452 |
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453 /* Ready current buffer for play and change current buffer */ |
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454 if (stream != device->fake_stream && !device->paused) { |
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455 current_audio.impl.PlayDevice(device); |
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456 /* Wait for an audio buffer to become available */ |
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457 current_audio.impl.WaitDevice(device); |
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458 } else { |
3139 | 459 SDL_Delay((device->spec.samples * 1000) / |
460 device->spec.freq); | |
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461 } |
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462 } |
0 | 463 |
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464 } |
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465 } else { |
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466 /* Otherwise, do not use the streamer. This is the old code. */ |
0 | 467 |
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468 /* Loop, filling the audio buffers */ |
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469 while (device->enabled) { |
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470 |
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471 /* Fill the current buffer with sound */ |
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472 if (device->convert.needed) { |
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473 if (device->convert.buf) { |
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474 stream = device->convert.buf; |
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475 } else { |
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476 continue; |
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477 } |
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478 } else { |
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479 stream = current_audio.impl.GetDeviceBuf(device); |
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480 if (stream == NULL) { |
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481 stream = device->fake_stream; |
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482 } |
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483 } |
0 | 484 |
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485 if (!device->paused) { |
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486 SDL_mutexP(device->mixer_lock); |
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487 (*fill) (udata, stream, stream_len); |
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488 SDL_mutexV(device->mixer_lock); |
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489 } |
1562 | 490 |
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491 /* Convert the audio if necessary */ |
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492 if (device->convert.needed) { |
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493 SDL_ConvertAudio(&device->convert); |
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494 stream = current_audio.impl.GetDeviceBuf(device); |
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495 if (stream == NULL) { |
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496 stream = device->fake_stream; |
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497 } |
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498 SDL_memcpy(stream, device->convert.buf, |
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499 device->convert.len_cvt); |
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500 } |
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501 |
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502 /* Ready current buffer for play and change current buffer */ |
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503 if (stream != device->fake_stream && !device->paused) { |
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504 current_audio.impl.PlayDevice(device); |
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505 /* Wait for an audio buffer to become available */ |
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506 current_audio.impl.WaitDevice(device); |
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507 } else { |
3139 | 508 SDL_Delay((device->spec.samples * 1000) / device->spec.freq); |
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509 } |
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510 } |
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511 } |
1562 | 512 |
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513 /* Wait for the audio to drain.. */ |
2049
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Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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514 current_audio.impl.WaitDone(device); |
21
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
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diff
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515 |
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516 /* If necessary, deinit the streamer */ |
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517 if (device->use_streamer == 1) |
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518 SDL_StreamDeinit(&device->streamer); |
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519 |
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520 return (0); |
0 | 521 } |
522 | |
322
fd93a09655e3
The audio lock and unlock functions are now a part of the driver.
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523 |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
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524 static SDL_AudioFormat |
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525 SDL_ParseAudioFormat(const char *string) |
1794 | 526 { |
2076
939420dee849
Use SDL_strcmp(), not strcmp().
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|
527 #define CHECK_FMT_STRING(x) if (SDL_strcmp(string, #x) == 0) return AUDIO_##x |
2049
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528 CHECK_FMT_STRING(U8); |
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529 CHECK_FMT_STRING(S8); |
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530 CHECK_FMT_STRING(U16LSB); |
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531 CHECK_FMT_STRING(S16LSB); |
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532 CHECK_FMT_STRING(U16MSB); |
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533 CHECK_FMT_STRING(S16MSB); |
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534 CHECK_FMT_STRING(U16SYS); |
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535 CHECK_FMT_STRING(S16SYS); |
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536 CHECK_FMT_STRING(U16); |
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537 CHECK_FMT_STRING(S16); |
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538 CHECK_FMT_STRING(S32LSB); |
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539 CHECK_FMT_STRING(S32MSB); |
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540 CHECK_FMT_STRING(S32SYS); |
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541 CHECK_FMT_STRING(S32); |
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542 CHECK_FMT_STRING(F32LSB); |
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543 CHECK_FMT_STRING(F32MSB); |
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544 CHECK_FMT_STRING(F32SYS); |
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545 CHECK_FMT_STRING(F32); |
2060 | 546 #undef CHECK_FMT_STRING |
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547 return 0; |
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548 } |
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549 |
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550 int |
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551 SDL_GetNumAudioDrivers(void) |
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552 { |
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553 return (SDL_arraysize(bootstrap) - 1); |
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554 } |
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555 |
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556 const char * |
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557 SDL_GetAudioDriver(int index) |
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558 { |
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559 if (index >= 0 && index < SDL_GetNumAudioDrivers()) { |
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560 return (bootstrap[index]->name); |
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561 } |
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562 return (NULL); |
1794 | 563 } |
564 | |
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565 int |
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566 SDL_AudioInit(const char *driver_name) |
0 | 567 { |
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568 int i = 0; |
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569 int initialized = 0; |
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570 int tried_to_init = 0; |
2938
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571 int rc = 0; |
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572 int best_choice = -1; |
0 | 573 |
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574 if (SDL_WasInit(SDL_INIT_AUDIO)) { |
2060 | 575 SDL_AudioQuit(); /* shutdown driver if already running. */ |
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576 } |
0 | 577 |
2060 | 578 SDL_memset(¤t_audio, '\0', sizeof(current_audio)); |
579 SDL_memset(open_devices, '\0', sizeof(open_devices)); | |
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580 |
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581 /* Select the proper audio driver */ |
1909
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582 if (driver_name == NULL) { |
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583 driver_name = SDL_getenv("SDL_AUDIODRIVER"); |
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584 } |
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585 |
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586 for (i = 0; (!initialized) && (bootstrap[i]); ++i) { |
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587 /* make sure we should even try this driver before doing so... */ |
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588 const AudioBootStrap *backend = bootstrap[i]; |
2060 | 589 if (((driver_name) && (SDL_strcasecmp(backend->name, driver_name))) || |
590 ((!driver_name) && (backend->demand_only))) { | |
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591 continue; |
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592 } |
0 | 593 |
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594 tried_to_init = 1; |
2060 | 595 SDL_memset(¤t_audio, 0, sizeof(current_audio)); |
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596 current_audio.name = backend->name; |
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597 current_audio.desc = backend->desc; |
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598 rc = backend->init(¤t_audio.impl); |
2942 | 599 if (rc == 2) { /* init'd, and devices available. Take it! */ |
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600 initialized = 1; |
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601 best_choice = i; |
2942 | 602 } else if (rc == 1) { /* init'd, but can't see any devices. */ |
2979 | 603 if (current_audio.impl.Deinitialize) { |
604 current_audio.impl.Deinitialize(); | |
605 } | |
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606 if (best_choice == -1) { |
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607 best_choice = i; |
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608 } |
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609 } |
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610 } |
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611 |
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612 /* No definite choice. Pick one that works but can't promise a device. */ |
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613 if ((!initialized) && (best_choice != -1)) { |
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614 const AudioBootStrap *backend = bootstrap[best_choice]; |
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615 SDL_memset(¤t_audio, 0, sizeof(current_audio)); |
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616 current_audio.name = backend->name; |
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617 current_audio.desc = backend->desc; |
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618 initialized = (backend->init(¤t_audio.impl) > 0); |
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619 } |
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620 |
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621 if (!initialized) { |
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622 /* specific drivers will set the error message if they fail... */ |
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623 if (!tried_to_init) { |
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624 if (driver_name) { |
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625 SDL_SetError("%s not available", driver_name); |
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626 } else { |
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627 SDL_SetError("No available audio device"); |
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628 } |
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629 } |
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630 |
2060 | 631 SDL_memset(¤t_audio, 0, sizeof(current_audio)); |
632 return (-1); /* No driver was available, so fail. */ | |
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633 } |
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634 |
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635 finalize_audio_entry_points(); |
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636 |
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637 return (0); |
0 | 638 } |
639 | |
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640 /* |
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641 * Get the current audio driver name |
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642 */ |
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643 const char * |
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644 SDL_GetCurrentAudioDriver() |
0 | 645 { |
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646 return current_audio.name; |
0 | 647 } |
648 | |
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649 |
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650 int |
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651 SDL_GetNumAudioDevices(int iscapture) |
0 | 652 { |
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653 if (!SDL_WasInit(SDL_INIT_AUDIO)) { |
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654 return -1; |
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655 } |
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656 if ((iscapture) && (!current_audio.impl.HasCaptureSupport)) { |
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657 return 0; |
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658 } |
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659 |
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660 if ((iscapture) && (current_audio.impl.OnlyHasDefaultInputDevice)) { |
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661 return 1; |
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662 } |
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663 |
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664 if ((!iscapture) && (current_audio.impl.OnlyHasDefaultOutputDevice)) { |
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665 return 1; |
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666 } |
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667 |
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668 return current_audio.impl.DetectDevices(iscapture); |
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669 } |
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670 |
0 | 671 |
2049
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672 const char * |
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673 SDL_GetAudioDeviceName(int index, int iscapture) |
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674 { |
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675 if (!SDL_WasInit(SDL_INIT_AUDIO)) { |
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676 SDL_SetError("Audio subsystem is not initialized"); |
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677 return NULL; |
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678 } |
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|
679 |
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680 if ((iscapture) && (!current_audio.impl.HasCaptureSupport)) { |
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681 SDL_SetError("No capture support"); |
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682 return NULL; |
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683 } |
2049
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684 |
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|
685 if (index < 0) { |
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686 SDL_SetError("No such device"); |
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687 return NULL; |
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|
688 } |
0 | 689 |
2049
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|
690 if ((iscapture) && (current_audio.impl.OnlyHasDefaultInputDevice)) { |
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|
691 return DEFAULT_INPUT_DEVNAME; |
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|
692 } |
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|
693 |
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|
694 if ((!iscapture) && (current_audio.impl.OnlyHasDefaultOutputDevice)) { |
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|
695 return DEFAULT_OUTPUT_DEVNAME; |
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|
696 } |
262
ba5363e21df8
Don't allow multiple audio opens to succeed (until SDL 1.3)
Sam Lantinga <slouken@libsdl.org>
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|
697 |
2049
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|
698 return current_audio.impl.GetDeviceName(index, iscapture); |
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|
699 } |
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|
700 |
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|
701 |
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|
702 static void |
2060 | 703 close_audio_device(SDL_AudioDevice * device) |
2049
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|
704 { |
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|
705 device->enabled = 0; |
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|
706 if (device->thread != NULL) { |
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|
707 SDL_WaitThread(device->thread, NULL); |
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|
708 } |
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|
709 if (device->mixer_lock != NULL) { |
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|
710 SDL_DestroyMutex(device->mixer_lock); |
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changeset
|
711 } |
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diff
changeset
|
712 if (device->fake_stream != NULL) { |
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|
713 SDL_FreeAudioMem(device->fake_stream); |
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|
714 } |
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|
715 if (device->convert.needed) { |
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changeset
|
716 SDL_FreeAudioMem(device->convert.buf); |
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|
717 } |
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|
718 if (device->opened) { |
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diff
changeset
|
719 current_audio.impl.CloseDevice(device); |
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changeset
|
720 device->opened = 0; |
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Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff
changeset
|
721 } |
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parents:
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changeset
|
722 SDL_FreeAudioMem(device); |
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|
723 } |
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|
724 |
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changeset
|
725 |
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parents:
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diff
changeset
|
726 /* |
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diff
changeset
|
727 * Sanity check desired AudioSpec for SDL_OpenAudio() in (orig). |
5f6550e5184f
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|
728 * Fills in a sanitized copy in (prepared). |
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|
729 * Returns non-zero if okay, zero on fatal parameters in (orig). |
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|
730 */ |
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diff
changeset
|
731 static int |
2060 | 732 prepare_audiospec(const SDL_AudioSpec * orig, SDL_AudioSpec * prepared) |
2049
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|
733 { |
2060 | 734 SDL_memcpy(prepared, orig, sizeof(SDL_AudioSpec)); |
2049
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changeset
|
735 |
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Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff
changeset
|
736 if (orig->callback == NULL) { |
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changeset
|
737 SDL_SetError("SDL_OpenAudio() passed a NULL callback"); |
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changeset
|
738 return 0; |
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|
739 } |
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changeset
|
740 |
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|
741 if (orig->freq == 0) { |
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diff
changeset
|
742 const char *env = SDL_getenv("SDL_AUDIO_FREQUENCY"); |
2060 | 743 if ((!env) || ((prepared->freq = SDL_atoi(env)) == 0)) { |
744 prepared->freq = 22050; /* a reasonable default */ | |
1895
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|
745 } |
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|
746 } |
2049
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|
747 |
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changeset
|
748 if (orig->format == 0) { |
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|
749 const char *env = SDL_getenv("SDL_AUDIO_FORMAT"); |
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|
750 if ((!env) || ((prepared->format = SDL_ParseAudioFormat(env)) == 0)) { |
2060 | 751 prepared->format = AUDIO_S16; /* a reasonable default */ |
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|
752 } |
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|
753 } |
2049
5f6550e5184f
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|
754 |
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|
755 switch (orig->channels) { |
2060 | 756 case 0:{ |
757 const char *env = SDL_getenv("SDL_AUDIO_CHANNELS"); | |
2141 | 758 if ((!env) || ((prepared->channels = (Uint8) SDL_atoi(env)) == 0)) { |
2060 | 759 prepared->channels = 2; /* a reasonable default */ |
760 } | |
761 break; | |
2049
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762 } |
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|
763 case 1: /* Mono */ |
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|
764 case 2: /* Stereo */ |
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|
765 case 4: /* surround */ |
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|
766 case 6: /* surround with center and lfe */ |
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|
767 break; |
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changeset
|
768 default: |
2049
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|
769 SDL_SetError("Unsupported number of audio channels."); |
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|
770 return 0; |
1895
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771 } |
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|
772 |
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|
773 if (orig->samples == 0) { |
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|
774 const char *env = SDL_getenv("SDL_AUDIO_SAMPLES"); |
2060 | 775 if ((!env) || ((prepared->samples = (Uint16) SDL_atoi(env)) == 0)) { |
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|
776 /* Pick a default of ~46 ms at desired frequency */ |
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|
777 /* !!! FIXME: remove this when the non-Po2 resampling is in. */ |
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|
778 const int samples = (prepared->freq / 1000) * 46; |
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779 int power2 = 1; |
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780 while (power2 < samples) { |
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781 power2 *= 2; |
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782 } |
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|
783 prepared->samples = power2; |
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784 } |
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785 } |
0 | 786 |
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|
787 /* Calculate the silence and size of the audio specification */ |
2049
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788 SDL_CalculateAudioSpec(prepared); |
21
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|
789 |
2049
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|
790 return 1; |
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791 } |
1408
ceb5c2fec4f1
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|
792 |
21
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|
793 |
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794 static SDL_AudioDeviceID |
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795 open_audio_device(const char *devname, int iscapture, |
2866
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796 const SDL_AudioSpec * desired, SDL_AudioSpec * obtained, |
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797 int allowed_changes, int min_id) |
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798 { |
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799 SDL_AudioDeviceID id = 0; |
2866
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800 SDL_AudioSpec _obtained; |
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801 SDL_AudioDevice *device; |
2866
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|
802 SDL_bool build_cvt; |
2049
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803 int i = 0; |
21
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|
804 |
2049
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805 if (!SDL_WasInit(SDL_INIT_AUDIO)) { |
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806 SDL_SetError("Audio subsystem is not initialized"); |
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|
807 return 0; |
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|
808 } |
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|
809 |
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|
810 if ((iscapture) && (!current_audio.impl.HasCaptureSupport)) { |
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811 SDL_SetError("No capture support"); |
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812 return 0; |
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|
813 } |
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|
814 |
2866
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|
815 if (!obtained) { |
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|
816 obtained = &_obtained; |
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|
817 } |
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|
818 if (!prepare_audiospec(desired, obtained)) { |
2049
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819 return 0; |
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|
820 } |
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821 |
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822 /* If app doesn't care about a specific device, let the user override. */ |
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823 if (devname == NULL) { |
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824 devname = SDL_getenv("SDL_AUDIO_DEVICE_NAME"); |
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825 } |
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|
826 |
2049
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|
827 /* |
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828 * Catch device names at the high level for the simple case... |
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829 * This lets us have a basic "device enumeration" for systems that |
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830 * don't have multiple devices, but makes sure the device name is |
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831 * always NULL when it hits the low level. |
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|
832 * |
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833 * Also make sure that the simple case prevents multiple simultaneous |
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|
834 * opens of the default system device. |
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|
835 */ |
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|
836 |
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|
837 if ((iscapture) && (current_audio.impl.OnlyHasDefaultInputDevice)) { |
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838 if ((devname) && (SDL_strcmp(devname, DEFAULT_INPUT_DEVNAME) != 0)) { |
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|
839 SDL_SetError("No such device"); |
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|
840 return 0; |
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|
841 } |
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|
842 devname = NULL; |
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|
843 |
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|
844 for (i = 0; i < SDL_arraysize(open_devices); i++) { |
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|
845 if ((open_devices[i]) && (open_devices[i]->iscapture)) { |
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|
846 SDL_SetError("Audio device already open"); |
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|
847 return 0; |
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|
848 } |
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|
849 } |
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|
850 } |
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|
851 |
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852 if ((!iscapture) && (current_audio.impl.OnlyHasDefaultOutputDevice)) { |
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|
853 if ((devname) && (SDL_strcmp(devname, DEFAULT_OUTPUT_DEVNAME) != 0)) { |
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|
854 SDL_SetError("No such device"); |
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|
855 return 0; |
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|
856 } |
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857 devname = NULL; |
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|
858 |
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|
859 for (i = 0; i < SDL_arraysize(open_devices); i++) { |
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860 if ((open_devices[i]) && (!open_devices[i]->iscapture)) { |
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|
861 SDL_SetError("Audio device already open"); |
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|
862 return 0; |
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|
863 } |
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|
864 } |
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865 } |
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866 |
2060 | 867 device = (SDL_AudioDevice *) SDL_AllocAudioMem(sizeof(SDL_AudioDevice)); |
2049
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868 if (device == NULL) { |
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869 SDL_OutOfMemory(); |
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870 return 0; |
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871 } |
2060 | 872 SDL_memset(device, '\0', sizeof(SDL_AudioDevice)); |
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873 device->spec = *obtained; |
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874 device->enabled = 1; |
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875 device->paused = 1; |
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876 device->iscapture = iscapture; |
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|
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 /* 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
|
879 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
|
880 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
|
881 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
|
882 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
|
883 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
|
884 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
|
885 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
886 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
887 |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
888 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
|
889 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
|
890 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
|
891 } |
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->opened = 1; |
0 | 893 |
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
|
894 /* 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
|
895 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
|
896 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
|
897 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
|
898 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
|
899 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
|
900 } |
0 | 901 |
2866
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
902 /* 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
|
903 if (device->spec.samples != obtained->samples) { |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
904 obtained->samples = device->spec.samples; |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
905 SDL_CalculateAudioSpec(obtained); |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
906 } |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
907 |
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
|
908 /* 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
|
909 build_cvt = SDL_FALSE; |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
910 if (obtained->freq != device->spec.freq) { |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
911 if (allowed_changes & SDL_AUDIO_ALLOW_FREQUENCY_CHANGE) { |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
912 obtained->freq = device->spec.freq; |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
913 } else { |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
914 build_cvt = SDL_TRUE; |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
915 } |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
916 } |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
917 if (obtained->format != device->spec.format) { |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
918 if (allowed_changes & SDL_AUDIO_ALLOW_FORMAT_CHANGE) { |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
919 obtained->format = device->spec.format; |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
920 } else { |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
921 build_cvt = SDL_TRUE; |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
922 } |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
923 } |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
924 if (obtained->channels != device->spec.channels) { |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
925 if (allowed_changes & SDL_AUDIO_ALLOW_CHANNELS_CHANGE) { |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
926 obtained->channels = device->spec.channels; |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
927 } else { |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
928 build_cvt = SDL_TRUE; |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
929 } |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
930 } |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
931 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
|
932 /* 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
|
933 if (SDL_BuildAudioCVT(&device->convert, |
2866
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
934 obtained->format, obtained->channels, |
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
935 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
|
936 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
|
937 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
|
938 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
|
939 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
|
940 } |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
941 if (device->convert.needed) { |
2866
e532417a6977
Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
942 device->convert.len = (int) (((double) obtained->size) / |
2060 | 943 device->convert.len_ratio); |
2053
716cf90f24a0
1.3 branch version of revision 2878.
Ryan C. Gordon <icculus@icculus.org>
parents:
2049
diff
changeset
|
944 |
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 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
|
946 (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
|
947 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
|
948 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
|
949 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
|
950 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
|
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 } |
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 } |
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 } |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
955 |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
956 /* Find an available device ID and store the structure... */ |
2060 | 957 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
|
958 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
|
959 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
|
960 break; |
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 |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
964 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
|
965 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
|
966 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
|
967 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
|
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 |
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
|
970 /* 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
|
971 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
|
972 /* 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
|
973 /* !!! FIXME: this is nasty. */ |
1402
d910939febfa
Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents:
1379
diff
changeset
|
974 #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
|
975 #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
|
976 device->thread = SDL_CreateThread(SDL_RunAudio, device, NULL, NULL); |
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
977 #else |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
978 device->thread = SDL_CreateThread(SDL_RunAudio, device); |
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
979 #endif |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
980 if (device->thread == NULL) { |
2060 | 981 SDL_CloseAudioDevice(id + 1); |
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 SDL_SetError("Couldn't create audio thread"); |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
983 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
|
984 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
985 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
986 |
2060 | 987 return id + 1; |
2049
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
988 } |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
diff
changeset
|
989 |
5f6550e5184f
Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents:
2045
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|
990 |
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|
991 int |
2866
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|
992 SDL_OpenAudio(SDL_AudioSpec * desired, SDL_AudioSpec * obtained) |
2049
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|
993 { |
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|
994 SDL_AudioDeviceID id = 0; |
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|
995 |
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|
996 /* Start up the audio driver, if necessary. This is legacy behaviour! */ |
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|
997 if (!SDL_WasInit(SDL_INIT_AUDIO)) { |
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|
998 if (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) { |
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|
999 return (-1); |
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|
1000 } |
2049
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|
1001 } |
0 | 1002 |
2049
5f6550e5184f
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|
1003 /* SDL_OpenAudio() is legacy and can only act on Device ID #1. */ |
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|
1004 if (open_devices[0] != NULL) { |
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|
1005 SDL_SetError("Audio device is already opened"); |
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|
1006 return (-1); |
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|
1007 } |
2049
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|
1008 |
2866
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|
1009 if (obtained) { |
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|
1010 id = open_audio_device(NULL, 0, desired, obtained, |
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Fixed SDL 1.2 compatibility problem.
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|
1011 SDL_AUDIO_ALLOW_ANY_CHANGE, 1); |
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|
1012 } else { |
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|
1013 id = open_audio_device(NULL, 0, desired, desired, 0, 1); |
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|
1014 } |
2060 | 1015 if (id > 1) { /* this should never happen in theory... */ |
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|
1016 SDL_CloseAudioDevice(id); |
2060 | 1017 SDL_SetError("Internal error"); /* MUST be Device ID #1! */ |
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|
1018 return (-1); |
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|
1019 } |
21
75a95f82bc1f
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diff
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|
1020 |
2049
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|
1021 return ((id == 0) ? -1 : 0); |
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|
1022 } |
21
75a95f82bc1f
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|
1023 |
2049
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|
1024 SDL_AudioDeviceID |
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|
1025 SDL_OpenAudioDevice(const char *device, int iscapture, |
2866
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|
1026 const SDL_AudioSpec * desired, SDL_AudioSpec * obtained, |
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|
1027 int allowed_changes) |
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|
1028 { |
2866
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|
1029 return open_audio_device(device, iscapture, desired, obtained, |
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|
1030 allowed_changes, 2); |
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|
1031 } |
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|
1032 |
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|
1033 SDL_audiostatus |
2049
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|
1034 SDL_GetAudioDeviceStatus(SDL_AudioDeviceID devid) |
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|
1035 { |
2049
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|
1036 SDL_AudioDevice *device = get_audio_device(devid); |
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|
1037 SDL_audiostatus status = SDL_AUDIO_STOPPED; |
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|
1038 if (device && device->enabled) { |
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|
1039 if (device->paused) { |
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|
1040 status = SDL_AUDIO_PAUSED; |
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|
1041 } else { |
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|
1042 status = SDL_AUDIO_PLAYING; |
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1043 } |
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|
1044 } |
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|
1045 return (status); |
0 | 1046 } |
1047 | |
2049
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|
1048 |
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|
1049 SDL_audiostatus |
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|
1050 SDL_GetAudioStatus(void) |
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|
1051 { |
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|
1052 return SDL_GetAudioDeviceStatus(1); |
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|
1053 } |
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|
1054 |
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|
1055 void |
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|
1056 SDL_PauseAudioDevice(SDL_AudioDeviceID devid, int pause_on) |
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|
1057 { |
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|
1058 SDL_AudioDevice *device = get_audio_device(devid); |
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|
1059 if (device) { |
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|
1060 device->paused = pause_on; |
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|
1061 } |
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|
1062 } |
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|
1063 |
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|
1064 void |
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|
1065 SDL_PauseAudio(int pause_on) |
0 | 1066 { |
2049
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|
1067 SDL_PauseAudioDevice(1, pause_on); |
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|
1068 } |
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|
1069 |
0 | 1070 |
2049
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|
1071 void |
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|
1072 SDL_LockAudioDevice(SDL_AudioDeviceID devid) |
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|
1073 { |
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|
1074 /* Obtain a lock on the mixing buffers */ |
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|
1075 SDL_AudioDevice *device = get_audio_device(devid); |
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|
1076 if (device) { |
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|
1077 current_audio.impl.LockDevice(device); |
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1078 } |
0 | 1079 } |
1080 | |
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|
1081 void |
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|
1082 SDL_LockAudio(void) |
0 | 1083 { |
2049
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|
1084 SDL_LockAudioDevice(1); |
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|
1085 } |
0 | 1086 |
2049
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|
1087 void |
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|
1088 SDL_UnlockAudioDevice(SDL_AudioDeviceID devid) |
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|
1089 { |
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|
1090 /* Obtain a lock on the mixing buffers */ |
2049
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|
1091 SDL_AudioDevice *device = get_audio_device(devid); |
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|
1092 if (device) { |
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|
1093 current_audio.impl.UnlockDevice(device); |
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1094 } |
0 | 1095 } |
1096 | |
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|
1097 void |
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|
1098 SDL_UnlockAudio(void) |
0 | 1099 { |
2049
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1100 SDL_UnlockAudioDevice(1); |
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|
1101 } |
0 | 1102 |
2049
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|
1103 void |
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|
1104 SDL_CloseAudioDevice(SDL_AudioDeviceID devid) |
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|
1105 { |
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|
1106 SDL_AudioDevice *device = get_audio_device(devid); |
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|
1107 if (device) { |
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|
1108 close_audio_device(device); |
2060 | 1109 open_devices[devid - 1] = NULL; |
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1110 } |
0 | 1111 } |
1112 | |
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1113 void |
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|
1114 SDL_CloseAudio(void) |
0 | 1115 { |
2049
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|
1116 SDL_CloseAudioDevice(1); |
0 | 1117 } |
1118 | |
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1119 void |
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|
1120 SDL_AudioQuit(void) |
0 | 1121 { |
2049
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|
1122 SDL_AudioDeviceID i; |
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|
1123 for (i = 0; i < SDL_arraysize(open_devices); i++) { |
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|
1124 SDL_CloseAudioDevice(i); |
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|
1125 } |
0 | 1126 |
2049
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|
1127 /* Free the driver data */ |
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|
1128 current_audio.impl.Deinitialize(); |
2060 | 1129 SDL_memset(¤t_audio, '\0', sizeof(current_audio)); |
1130 SDL_memset(open_devices, '\0', sizeof(open_devices)); | |
0 | 1131 } |
1132 | |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
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|
1133 #define NUM_FORMATS 10 |
0 | 1134 static int format_idx; |
1135 static int format_idx_sub; | |
1982
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diff
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|
1136 static SDL_AudioFormat format_list[NUM_FORMATS][NUM_FORMATS] = { |
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1137 {AUDIO_U8, AUDIO_S8, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, |
1982
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1138 AUDIO_U16MSB, AUDIO_S32LSB, AUDIO_S32MSB, AUDIO_F32LSB, AUDIO_F32MSB}, |
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1139 {AUDIO_S8, AUDIO_U8, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, |
1982
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|
1140 AUDIO_U16MSB, AUDIO_S32LSB, AUDIO_S32MSB, AUDIO_F32LSB, AUDIO_F32MSB}, |
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|
1141 {AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_S32LSB, |
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|
1142 AUDIO_S32MSB, AUDIO_F32LSB, AUDIO_F32MSB, AUDIO_U8, AUDIO_S8}, |
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|
1143 {AUDIO_S16MSB, AUDIO_S16LSB, AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_S32MSB, |
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|
1144 AUDIO_S32LSB, AUDIO_F32MSB, AUDIO_F32LSB, AUDIO_U8, AUDIO_S8}, |
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|
1145 {AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_S32LSB, |
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|
1146 AUDIO_S32MSB, AUDIO_F32LSB, AUDIO_F32MSB, AUDIO_U8, AUDIO_S8}, |
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|
1147 {AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_S16MSB, AUDIO_S16LSB, AUDIO_S32MSB, |
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|
1148 AUDIO_S32LSB, AUDIO_F32MSB, AUDIO_F32LSB, AUDIO_U8, AUDIO_S8}, |
1993
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Reordered the favored audio format list a little.
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1149 {AUDIO_S32LSB, AUDIO_S32MSB, AUDIO_F32LSB, AUDIO_F32MSB, AUDIO_S16LSB, |
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1150 AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_U8, AUDIO_S8}, |
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1151 {AUDIO_S32MSB, AUDIO_S32LSB, AUDIO_F32MSB, AUDIO_F32LSB, AUDIO_S16MSB, |
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1152 AUDIO_S16LSB, AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_U8, AUDIO_S8}, |
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1153 {AUDIO_F32LSB, AUDIO_F32MSB, AUDIO_S32LSB, AUDIO_S32MSB, AUDIO_S16LSB, |
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1154 AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_U8, AUDIO_S8}, |
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1155 {AUDIO_F32MSB, AUDIO_F32LSB, AUDIO_S32MSB, AUDIO_S32LSB, AUDIO_S16MSB, |
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|
1156 AUDIO_S16LSB, AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_U8, AUDIO_S8}, |
0 | 1157 }; |
1158 | |
1982
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|
1159 SDL_AudioFormat |
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|
1160 SDL_FirstAudioFormat(SDL_AudioFormat format) |
0 | 1161 { |
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|
1162 for (format_idx = 0; format_idx < NUM_FORMATS; ++format_idx) { |
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1163 if (format_list[format_idx][0] == format) { |
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|
1164 break; |
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|
1165 } |
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|
1166 } |
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|
1167 format_idx_sub = 0; |
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1168 return (SDL_NextAudioFormat()); |
0 | 1169 } |
1170 | |
1982
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|
1171 SDL_AudioFormat |
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|
1172 SDL_NextAudioFormat(void) |
0 | 1173 { |
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|
1174 if ((format_idx == NUM_FORMATS) || (format_idx_sub == NUM_FORMATS)) { |
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1175 return (0); |
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1176 } |
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|
1177 return (format_list[format_idx][format_idx_sub++]); |
0 | 1178 } |
1179 | |
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|
1180 void |
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|
1181 SDL_CalculateAudioSpec(SDL_AudioSpec * spec) |
0 | 1182 { |
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1183 switch (spec->format) { |
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1184 case AUDIO_U8: |
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1185 spec->silence = 0x80; |
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1186 break; |
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1187 default: |
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1188 spec->silence = 0x00; |
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1189 break; |
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1190 } |
2049
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1191 spec->size = SDL_AUDIO_BITSIZE(spec->format) / 8; |
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1192 spec->size *= spec->channels; |
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1193 spec->size *= spec->samples; |
0 | 1194 } |
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1195 |
2049
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1196 |
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1197 /* |
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1198 * Moved here from SDL_mixer.c, since it relies on internals of an opened |
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1199 * audio device (and is deprecated, by the way!). |
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1200 */ |
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1201 void |
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1202 SDL_MixAudio(Uint8 * dst, const Uint8 * src, Uint32 len, int volume) |
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1203 { |
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1204 /* Mix the user-level audio format */ |
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1205 SDL_AudioDevice *device = get_audio_device(1); |
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1206 if (device != NULL) { |
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1207 SDL_AudioFormat format; |
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1208 if (device->convert.needed) { |
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1209 format = device->convert.src_format; |
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1210 } else { |
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1211 format = device->spec.format; |
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1212 } |
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1213 SDL_MixAudioFormat(dst, src, format, len, volume); |
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1214 } |
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1215 } |
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1216 |
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1217 /* vi: set ts=4 sw=4 expandtab: */ |