Mercurial > sdl-ios-xcode
annotate src/audio/SDL_audio.c @ 1118:65f4b2dd46b7
Date: Wed, 17 Aug 2005 11:23:40 -0400
From: Matt L <prometheus.uw@gmail.com>
To: "Ryan C. Gordon" <icculus@clutteredmind.org>
Subject: SDL Patch
Hio,
I saw your last call on the mailing list. Here's a patch which I
submitted about two weeks ago which hasn't made it in.
In the current sdl.m4, there's a bug where if your configure.ac, you
have AC_LANG(C++) specified, it won't properly compile and link the SDL
test program when you run the configure script. This is because only the
default CFLAGS is overriden in sdl.m4, and in the patch below, I've
fixed it so it overrides CXXFLAGS as well, allowing it to work with g++.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Thu, 18 Aug 2005 06:06:02 +0000 |
| parents | d74fbf56f2f6 |
| children | 173c063d4f55 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information for 2004 (Happy New Year!)
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3 Copyright (C) 1997-2004 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 of the License, or (at your option) any later version. | |
| 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 | |
| 13 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 /* Allow access to a raw mixing buffer */ | |
| 29 #include <stdlib.h> | |
| 30 #include <stdio.h> | |
| 31 #include <string.h> | |
| 32 | |
| 33 #include "SDL.h" | |
| 34 #include "SDL_audio.h" | |
| 35 #include "SDL_timer.h" | |
| 36 #include "SDL_error.h" | |
| 37 #include "SDL_audio_c.h" | |
| 38 #include "SDL_audiomem.h" | |
| 39 #include "SDL_sysaudio.h" | |
| 40 | |
| 41 /* Available audio drivers */ | |
| 42 static AudioBootStrap *bootstrap[] = { | |
|
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43 #ifdef OPENBSD_AUDIO_SUPPORT |
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44 &OPENBSD_AUDIO_bootstrap, |
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45 #endif |
| 0 | 46 #ifdef OSS_SUPPORT |
| 47 &DSP_bootstrap, | |
| 48 &DMA_bootstrap, | |
| 49 #endif | |
| 50 #ifdef ALSA_SUPPORT | |
| 51 &ALSA_bootstrap, | |
| 52 #endif | |
|
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53 #ifdef QNXNTOAUDIO_SUPPORT |
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54 &QNXNTOAUDIO_bootstrap, |
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55 #endif |
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56 #ifdef SUNAUDIO_SUPPORT |
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57 &SUNAUDIO_bootstrap, |
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58 #endif |
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59 #ifdef DMEDIA_SUPPORT |
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60 &DMEDIA_bootstrap, |
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61 #endif |
| 0 | 62 #ifdef ARTSC_SUPPORT |
| 63 &ARTSC_bootstrap, | |
| 64 #endif | |
| 65 #ifdef ESD_SUPPORT | |
| 66 &ESD_bootstrap, | |
| 67 #endif | |
| 68 #ifdef NAS_SUPPORT | |
| 69 &NAS_bootstrap, | |
| 70 #endif | |
| 71 #ifdef ENABLE_DIRECTX | |
| 72 &DSOUND_bootstrap, | |
| 73 #endif | |
| 74 #ifdef ENABLE_WINDIB | |
| 75 &WAVEOUT_bootstrap, | |
| 76 #endif | |
| 77 #ifdef __BEOS__ | |
| 78 &BAUDIO_bootstrap, | |
| 79 #endif | |
|
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80 #ifdef MACOSX |
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81 &COREAUDIO_bootstrap, |
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82 #endif |
| 0 | 83 #if defined(macintosh) || TARGET_API_MAC_CARBON |
| 84 &SNDMGR_bootstrap, | |
| 85 #endif | |
| 86 #ifdef _AIX | |
| 87 &Paud_bootstrap, | |
| 88 #endif | |
|
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89 #ifdef ENABLE_AHI |
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90 &AHI_bootstrap, |
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91 #endif |
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92 #ifdef MMEAUDIO_SUPPORT |
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93 &MMEAUDIO_bootstrap, |
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94 #endif |
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95 #ifdef MINTAUDIO_SUPPORT |
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96 &MINTAUDIO_GSXB_bootstrap, |
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97 &MINTAUDIO_MCSN_bootstrap, |
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98 &MINTAUDIO_STFA_bootstrap, |
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99 &MINTAUDIO_XBIOS_bootstrap, |
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100 &MINTAUDIO_DMA8_bootstrap, |
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101 #endif |
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102 #ifdef DISKAUD_SUPPORT |
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103 &DISKAUD_bootstrap, |
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104 #endif |
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105 #ifdef ENABLE_DC |
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106 &DCAUD_bootstrap, |
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107 #endif |
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108 #ifdef DRENDERER_SUPPORT |
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109 &DRENDERER_bootstrap, |
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110 #endif |
| 0 | 111 NULL |
| 112 }; | |
| 113 SDL_AudioDevice *current_audio = NULL; | |
| 114 | |
| 115 /* Various local functions */ | |
| 116 int SDL_AudioInit(const char *driver_name); | |
| 117 void SDL_AudioQuit(void); | |
| 118 | |
|
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119 #ifdef ENABLE_AHI |
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120 static int audio_configured = 0; |
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121 #endif |
| 0 | 122 |
| 123 /* The general mixing thread function */ | |
| 124 int SDL_RunAudio(void *audiop) | |
| 125 { | |
| 126 SDL_AudioDevice *audio = (SDL_AudioDevice *)audiop; | |
| 127 Uint8 *stream; | |
| 128 int stream_len; | |
| 129 void *udata; | |
| 130 void (*fill)(void *userdata,Uint8 *stream, int len); | |
| 131 int silence; | |
|
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132 #ifdef ENABLE_AHI |
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133 int started = 0; |
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134 |
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135 /* AmigaOS NEEDS that the audio driver is opened in the thread that uses it! */ |
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136 |
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137 D(bug("Task audio started audio struct:<%lx>...\n",audiop)); |
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138 |
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139 D(bug("Before Openaudio...")); |
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140 if(audio->OpenAudio(audio, &audio->spec)==-1) |
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141 { |
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142 D(bug("Open audio failed...\n")); |
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143 return(-1); |
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144 } |
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145 D(bug("OpenAudio...OK\n")); |
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146 #endif |
| 0 | 147 |
| 148 /* Perform any thread setup */ | |
| 149 if ( audio->ThreadInit ) { | |
| 150 audio->ThreadInit(audio); | |
| 151 } | |
| 152 audio->threadid = SDL_ThreadID(); | |
| 153 | |
| 154 /* Set up the mixing function */ | |
| 155 fill = audio->spec.callback; | |
| 156 udata = audio->spec.userdata; | |
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157 |
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158 #ifdef ENABLE_AHI |
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159 audio_configured = 1; |
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160 |
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161 D(bug("Audio configured... Checking for conversion\n")); |
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162 SDL_mutexP(audio->mixer_lock); |
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163 D(bug("Semaphore obtained...\n")); |
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164 #endif |
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165 |
| 0 | 166 if ( audio->convert.needed ) { |
| 167 if ( audio->convert.src_format == AUDIO_U8 ) { | |
| 168 silence = 0x80; | |
| 169 } else { | |
| 170 silence = 0; | |
| 171 } | |
| 172 stream_len = audio->convert.len; | |
| 173 } else { | |
| 174 silence = audio->spec.silence; | |
| 175 stream_len = audio->spec.size; | |
| 176 } | |
| 177 stream = audio->fake_stream; | |
| 178 | |
|
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179 #ifdef ENABLE_AHI |
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180 SDL_mutexV(audio->mixer_lock); |
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181 D(bug("Entering audio loop...\n")); |
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182 #endif |
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183 |
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184 |
| 0 | 185 /* Loop, filling the audio buffers */ |
| 186 while ( audio->enabled ) { | |
| 187 | |
| 188 /* Wait for new current buffer to finish playing */ | |
| 189 if ( stream == audio->fake_stream ) { | |
| 190 SDL_Delay((audio->spec.samples*1000)/audio->spec.freq); | |
| 191 } else { | |
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192 #ifdef ENABLE_AHI |
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193 if ( started > 1 ) |
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194 #endif |
| 0 | 195 audio->WaitAudio(audio); |
| 196 } | |
| 197 | |
| 198 /* Fill the current buffer with sound */ | |
| 199 if ( audio->convert.needed ) { | |
| 200 if ( audio->convert.buf ) { | |
| 201 stream = audio->convert.buf; | |
| 202 } else { | |
| 203 continue; | |
| 204 } | |
| 205 } else { | |
| 206 stream = audio->GetAudioBuf(audio); | |
| 207 if ( stream == NULL ) { | |
| 208 stream = audio->fake_stream; | |
| 209 } | |
| 210 } | |
| 211 memset(stream, silence, stream_len); | |
| 212 | |
| 213 if ( ! audio->paused ) { | |
| 214 SDL_mutexP(audio->mixer_lock); | |
| 215 (*fill)(udata, stream, stream_len); | |
| 216 SDL_mutexV(audio->mixer_lock); | |
| 217 } | |
| 218 | |
| 219 /* Convert the audio if necessary */ | |
| 220 if ( audio->convert.needed ) { | |
| 221 SDL_ConvertAudio(&audio->convert); | |
| 222 stream = audio->GetAudioBuf(audio); | |
| 223 if ( stream == NULL ) { | |
| 224 stream = audio->fake_stream; | |
| 225 } | |
| 226 memcpy(stream, audio->convert.buf, | |
| 227 audio->convert.len_cvt); | |
| 228 } | |
| 229 | |
| 230 /* Ready current buffer for play and change current buffer */ | |
| 231 if ( stream != audio->fake_stream ) { | |
| 232 audio->PlayAudio(audio); | |
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233 #ifdef ENABLE_AHI |
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234 /* AmigaOS don't have to wait the first time audio is played! */ |
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235 started++; |
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236 #endif |
| 0 | 237 } |
| 238 } | |
| 239 /* Wait for the audio to drain.. */ | |
| 240 if ( audio->WaitDone ) { | |
| 241 audio->WaitDone(audio); | |
| 242 } | |
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243 |
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244 #ifdef ENABLE_AHI |
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245 D(bug("WaitAudio...Done\n")); |
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246 |
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247 audio->CloseAudio(audio); |
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248 |
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249 D(bug("CloseAudio..Done, subtask exiting...\n")); |
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250 audio_configured = 0; |
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251 #endif |
| 0 | 252 return(0); |
| 253 } | |
| 254 | |
|
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255 static void SDL_LockAudio_Default(SDL_AudioDevice *audio) |
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256 { |
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257 if ( audio->thread && (SDL_ThreadID() == audio->threadid) ) { |
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258 return; |
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259 } |
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260 SDL_mutexP(audio->mixer_lock); |
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261 } |
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262 |
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263 static void SDL_UnlockAudio_Default(SDL_AudioDevice *audio) |
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264 { |
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265 if ( audio->thread && (SDL_ThreadID() == audio->threadid) ) { |
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266 return; |
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267 } |
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268 SDL_mutexV(audio->mixer_lock); |
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269 } |
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270 |
| 0 | 271 int SDL_AudioInit(const char *driver_name) |
| 272 { | |
| 273 SDL_AudioDevice *audio; | |
| 274 int i = 0, idx; | |
| 275 | |
| 276 /* Check to make sure we don't overwrite 'current_audio' */ | |
| 277 if ( current_audio != NULL ) { | |
| 278 SDL_AudioQuit(); | |
| 279 } | |
| 280 | |
| 281 /* Select the proper audio driver */ | |
| 282 audio = NULL; | |
| 283 idx = 0; | |
| 284 #ifdef unix | |
| 285 if ( (driver_name == NULL) && (getenv("ESPEAKER") != NULL) ) { | |
| 286 /* Ahem, we know that if ESPEAKER is set, user probably wants | |
| 287 to use ESD, but don't start it if it's not already running. | |
| 288 This probably isn't the place to do this, but... Shh! :) | |
| 289 */ | |
| 290 for ( i=0; bootstrap[i]; ++i ) { | |
| 291 if ( strcmp(bootstrap[i]->name, "esd") == 0 ) { | |
| 292 const char *esd_no_spawn; | |
| 293 | |
| 294 /* Don't start ESD if it's not running */ | |
| 295 esd_no_spawn = getenv("ESD_NO_SPAWN"); | |
| 296 if ( esd_no_spawn == NULL ) { | |
| 297 putenv("ESD_NO_SPAWN=1"); | |
| 298 } | |
| 299 if ( bootstrap[i]->available() ) { | |
| 300 audio = bootstrap[i]->create(0); | |
| 301 break; | |
| 302 } | |
| 303 #ifdef linux /* No unsetenv() on most platforms */ | |
| 304 if ( esd_no_spawn == NULL ) { | |
| 305 unsetenv("ESD_NO_SPAWN"); | |
| 306 } | |
| 307 #endif | |
| 308 } | |
| 309 } | |
| 310 } | |
| 311 #endif /* unix */ | |
| 312 if ( audio == NULL ) { | |
| 313 if ( driver_name != NULL ) { | |
| 314 #if 0 /* This will be replaced with a better driver selection API */ | |
| 315 if ( strrchr(driver_name, ':') != NULL ) { | |
| 316 idx = atoi(strrchr(driver_name, ':')+1); | |
| 317 } | |
| 318 #endif | |
| 319 for ( i=0; bootstrap[i]; ++i ) { | |
| 320 if (strncmp(bootstrap[i]->name, driver_name, | |
| 321 strlen(bootstrap[i]->name)) == 0) { | |
| 322 if ( bootstrap[i]->available() ) { | |
| 323 audio=bootstrap[i]->create(idx); | |
| 324 break; | |
| 325 } | |
| 326 } | |
| 327 } | |
| 328 } else { | |
| 329 for ( i=0; bootstrap[i]; ++i ) { | |
| 330 if ( bootstrap[i]->available() ) { | |
| 331 audio = bootstrap[i]->create(idx); | |
| 332 if ( audio != NULL ) { | |
| 333 break; | |
| 334 } | |
| 335 } | |
| 336 } | |
| 337 } | |
| 338 if ( audio == NULL ) { | |
| 339 SDL_SetError("No available audio device"); | |
| 340 #if 0 /* Don't fail SDL_Init() if audio isn't available. | |
| 341 SDL_OpenAudio() will handle it at that point. *sigh* | |
| 342 */ | |
| 343 return(-1); | |
| 344 #endif | |
| 345 } | |
| 346 } | |
| 347 current_audio = audio; | |
| 348 if ( current_audio ) { | |
| 349 current_audio->name = bootstrap[i]->name; | |
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350 if ( !current_audio->LockAudio && !current_audio->UnlockAudio ) { |
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351 current_audio->LockAudio = SDL_LockAudio_Default; |
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352 current_audio->UnlockAudio = SDL_UnlockAudio_Default; |
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353 } |
| 0 | 354 } |
| 355 return(0); | |
| 356 } | |
| 357 | |
| 358 char *SDL_AudioDriverName(char *namebuf, int maxlen) | |
| 359 { | |
| 360 if ( current_audio != NULL ) { | |
| 361 strncpy(namebuf, current_audio->name, maxlen-1); | |
| 362 namebuf[maxlen-1] = '\0'; | |
| 363 return(namebuf); | |
| 364 } | |
| 365 return(NULL); | |
| 366 } | |
| 367 | |
| 368 int SDL_OpenAudio(SDL_AudioSpec *desired, SDL_AudioSpec *obtained) | |
| 369 { | |
| 370 SDL_AudioDevice *audio; | |
| 371 | |
| 372 /* Start up the audio driver, if necessary */ | |
| 373 if ( ! current_audio ) { | |
| 374 if ( (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) || | |
| 375 (current_audio == NULL) ) { | |
| 376 return(-1); | |
| 377 } | |
| 378 } | |
| 379 audio = current_audio; | |
| 380 | |
|
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381 if (audio->opened) { |
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382 SDL_SetError("Audio device is already opened"); |
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383 return(-1); |
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384 } |
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385 |
| 0 | 386 /* Verify some parameters */ |
| 387 if ( desired->callback == NULL ) { | |
| 388 SDL_SetError("SDL_OpenAudio() passed a NULL callback"); | |
| 389 return(-1); | |
| 390 } | |
| 391 switch ( desired->channels ) { | |
| 392 case 1: /* Mono */ | |
| 393 case 2: /* Stereo */ | |
|
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394 case 4: /* surround */ |
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395 case 6: /* surround with center and lfe */ |
| 0 | 396 break; |
| 397 default: | |
| 398 SDL_SetError("1 (mono) and 2 (stereo) channels supported"); | |
| 399 return(-1); | |
| 400 } | |
| 401 | |
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402 #if defined(macintosh) || (defined(__riscos__) && !defined(DISABLE_THREADS)) |
| 0 | 403 /* FIXME: Need to implement PPC interrupt asm for SDL_LockAudio() */ |
| 404 #else | |
|
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405 #if defined(__MINT__) && !defined(ENABLE_THREADS) |
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406 /* Uses interrupt driven audio, without thread */ |
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407 #else |
| 0 | 408 /* Create a semaphore for locking the sound buffers */ |
| 409 audio->mixer_lock = SDL_CreateMutex(); | |
| 410 if ( audio->mixer_lock == NULL ) { | |
| 411 SDL_SetError("Couldn't create mixer lock"); | |
| 412 SDL_CloseAudio(); | |
| 413 return(-1); | |
| 414 } | |
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415 #endif /* __MINT__ */ |
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416 #endif /* macintosh */ |
| 0 | 417 |
| 418 /* Calculate the silence and size of the audio specification */ | |
| 419 SDL_CalculateAudioSpec(desired); | |
| 420 | |
| 421 /* Open the audio subsystem */ | |
| 422 memcpy(&audio->spec, desired, sizeof(audio->spec)); | |
| 423 audio->convert.needed = 0; | |
| 424 audio->enabled = 1; | |
| 425 audio->paused = 1; | |
|
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426 |
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427 #ifndef ENABLE_AHI |
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428 |
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429 /* AmigaOS opens audio inside the main loop */ |
| 0 | 430 audio->opened = audio->OpenAudio(audio, &audio->spec)+1; |
|
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431 |
| 0 | 432 if ( ! audio->opened ) { |
| 433 SDL_CloseAudio(); | |
| 434 return(-1); | |
| 435 } | |
|
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436 #else |
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437 D(bug("Locking semaphore...")); |
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438 SDL_mutexP(audio->mixer_lock); |
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439 |
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440 audio->thread = SDL_CreateThread(SDL_RunAudio, audio); |
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441 D(bug("Created thread...\n")); |
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442 |
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443 if ( audio->thread == NULL ) { |
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444 SDL_mutexV(audio->mixer_lock); |
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445 SDL_CloseAudio(); |
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446 SDL_SetError("Couldn't create audio thread"); |
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447 return(-1); |
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448 } |
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449 |
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450 while(!audio_configured) |
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451 SDL_Delay(100); |
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452 #endif |
| 0 | 453 |
| 454 /* If the audio driver changes the buffer size, accept it */ | |
| 455 if ( audio->spec.samples != desired->samples ) { | |
| 456 desired->samples = audio->spec.samples; | |
| 457 SDL_CalculateAudioSpec(desired); | |
| 458 } | |
| 459 | |
| 460 /* Allocate a fake audio memory buffer */ | |
| 461 audio->fake_stream = SDL_AllocAudioMem(audio->spec.size); | |
| 462 if ( audio->fake_stream == NULL ) { | |
| 463 SDL_CloseAudio(); | |
| 464 SDL_OutOfMemory(); | |
| 465 return(-1); | |
| 466 } | |
| 467 | |
| 468 /* See if we need to do any conversion */ | |
|
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469 if ( obtained != NULL ) { |
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470 memcpy(obtained, &audio->spec, sizeof(audio->spec)); |
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471 } else if ( desired->freq != audio->spec.freq || |
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472 desired->format != audio->spec.format || |
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473 desired->channels != audio->spec.channels ) { |
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474 /* Build an audio conversion block */ |
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475 if ( SDL_BuildAudioCVT(&audio->convert, |
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476 desired->format, desired->channels, |
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477 desired->freq, |
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478 audio->spec.format, audio->spec.channels, |
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479 audio->spec.freq) < 0 ) { |
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480 SDL_CloseAudio(); |
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481 return(-1); |
| 0 | 482 } |
|
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483 if ( audio->convert.needed ) { |
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484 audio->convert.len = desired->size; |
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485 audio->convert.buf =(Uint8 *)SDL_AllocAudioMem( |
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486 audio->convert.len*audio->convert.len_mult); |
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487 if ( audio->convert.buf == NULL ) { |
| 0 | 488 SDL_CloseAudio(); |
|
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Simplify code and clean up Valgrind warning
Sam Lantinga <slouken@libsdl.org>
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489 SDL_OutOfMemory(); |
| 0 | 490 return(-1); |
| 491 } | |
| 492 } | |
| 493 } | |
| 494 | |
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75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
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495 #ifndef ENABLE_AHI |
| 0 | 496 /* Start the audio thread if necessary */ |
| 497 switch (audio->opened) { | |
| 498 case 1: | |
| 499 /* Start the audio thread */ | |
| 500 audio->thread = SDL_CreateThread(SDL_RunAudio, audio); | |
| 501 if ( audio->thread == NULL ) { | |
| 502 SDL_CloseAudio(); | |
| 503 SDL_SetError("Couldn't create audio thread"); | |
| 504 return(-1); | |
| 505 } | |
| 506 break; | |
| 507 | |
| 508 default: | |
| 509 /* The audio is now playing */ | |
| 510 break; | |
| 511 } | |
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21
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
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512 #else |
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75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
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513 SDL_mutexV(audio->mixer_lock); |
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75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
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514 D(bug("SDL_OpenAudio USCITA...\n")); |
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75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
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diff
changeset
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515 |
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75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
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516 #endif |
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75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
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diff
changeset
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517 |
| 0 | 518 return(0); |
| 519 } | |
| 520 | |
| 521 SDL_audiostatus SDL_GetAudioStatus(void) | |
| 522 { | |
| 523 SDL_AudioDevice *audio = current_audio; | |
| 524 SDL_audiostatus status; | |
| 525 | |
| 526 status = SDL_AUDIO_STOPPED; | |
| 527 if ( audio && audio->enabled ) { | |
| 528 if ( audio->paused ) { | |
| 529 status = SDL_AUDIO_PAUSED; | |
| 530 } else { | |
| 531 status = SDL_AUDIO_PLAYING; | |
| 532 } | |
| 533 } | |
| 534 return(status); | |
| 535 } | |
| 536 | |
| 537 void SDL_PauseAudio (int pause_on) | |
| 538 { | |
| 539 SDL_AudioDevice *audio = current_audio; | |
| 540 | |
| 541 if ( audio ) { | |
| 542 audio->paused = pause_on; | |
| 543 } | |
| 544 } | |
| 545 | |
| 546 void SDL_LockAudio (void) | |
| 547 { | |
| 548 SDL_AudioDevice *audio = current_audio; | |
| 549 | |
| 550 /* Obtain a lock on the mixing buffers */ | |
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fd93a09655e3
The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents:
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551 if ( audio && audio->LockAudio ) { |
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fd93a09655e3
The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
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552 audio->LockAudio(audio); |
| 0 | 553 } |
| 554 } | |
| 555 | |
| 556 void SDL_UnlockAudio (void) | |
| 557 { | |
| 558 SDL_AudioDevice *audio = current_audio; | |
| 559 | |
| 560 /* Release lock on the mixing buffers */ | |
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The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
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561 if ( audio && audio->UnlockAudio ) { |
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fd93a09655e3
The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
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562 audio->UnlockAudio(audio); |
| 0 | 563 } |
| 564 } | |
| 565 | |
| 566 void SDL_CloseAudio (void) | |
| 567 { | |
| 568 SDL_QuitSubSystem(SDL_INIT_AUDIO); | |
| 569 } | |
| 570 | |
| 571 void SDL_AudioQuit(void) | |
| 572 { | |
| 573 SDL_AudioDevice *audio = current_audio; | |
| 574 | |
| 575 if ( audio ) { | |
| 576 audio->enabled = 0; | |
| 577 if ( audio->thread != NULL ) { | |
| 578 SDL_WaitThread(audio->thread, NULL); | |
| 579 } | |
| 580 if ( audio->mixer_lock != NULL ) { | |
| 581 SDL_DestroyMutex(audio->mixer_lock); | |
| 582 } | |
| 583 if ( audio->fake_stream != NULL ) { | |
| 584 SDL_FreeAudioMem(audio->fake_stream); | |
| 585 } | |
| 586 if ( audio->convert.needed ) { | |
| 587 SDL_FreeAudioMem(audio->convert.buf); | |
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21
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
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diff
changeset
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588 |
| 0 | 589 } |
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21
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
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590 #ifndef ENABLE_AHI |
| 0 | 591 if ( audio->opened ) { |
| 592 audio->CloseAudio(audio); | |
| 593 audio->opened = 0; | |
| 594 } | |
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21
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
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595 #endif |
| 0 | 596 /* Free the driver data */ |
| 597 audio->free(audio); | |
| 598 current_audio = NULL; | |
| 599 } | |
| 600 } | |
| 601 | |
| 602 #define NUM_FORMATS 6 | |
| 603 static int format_idx; | |
| 604 static int format_idx_sub; | |
| 605 static Uint16 format_list[NUM_FORMATS][NUM_FORMATS] = { | |
| 606 { AUDIO_U8, AUDIO_S8, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB }, | |
| 607 { AUDIO_S8, AUDIO_U8, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB }, | |
| 608 { AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_U8, AUDIO_S8 }, | |
| 609 { AUDIO_S16MSB, AUDIO_S16LSB, AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_U8, AUDIO_S8 }, | |
| 610 { AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U8, AUDIO_S8 }, | |
| 611 { AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_S16MSB, AUDIO_S16LSB, AUDIO_U8, AUDIO_S8 }, | |
| 612 }; | |
| 613 | |
| 614 Uint16 SDL_FirstAudioFormat(Uint16 format) | |
| 615 { | |
| 616 for ( format_idx=0; format_idx < NUM_FORMATS; ++format_idx ) { | |
| 617 if ( format_list[format_idx][0] == format ) { | |
| 618 break; | |
| 619 } | |
| 620 } | |
| 621 format_idx_sub = 0; | |
| 622 return(SDL_NextAudioFormat()); | |
| 623 } | |
| 624 | |
| 625 Uint16 SDL_NextAudioFormat(void) | |
| 626 { | |
| 627 if ( (format_idx == NUM_FORMATS) || (format_idx_sub == NUM_FORMATS) ) { | |
| 628 return(0); | |
| 629 } | |
| 630 return(format_list[format_idx][format_idx_sub++]); | |
| 631 } | |
| 632 | |
| 633 void SDL_CalculateAudioSpec(SDL_AudioSpec *spec) | |
| 634 { | |
| 635 switch (spec->format) { | |
| 636 case AUDIO_U8: | |
| 637 spec->silence = 0x80; | |
| 638 break; | |
| 639 default: | |
| 640 spec->silence = 0x00; | |
| 641 break; | |
| 642 } | |
| 643 spec->size = (spec->format&0xFF)/8; | |
| 644 spec->size *= spec->channels; | |
| 645 spec->size *= spec->samples; | |
| 646 } |