Mercurial > sdl-ios-xcode
annotate src/audio/macrom/SDL_romaudio.c @ 1650:ee4f2d77206f
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| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 22 Apr 2006 19:50:23 +0000 |
| parents | f12379c41042 |
| children | 782fd950bd46 c121d94672cb a1b03ba2fcd0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
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24 #if defined(__APPLE__) && defined(__MACH__) |
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25 # include <Carbon/Carbon.h> |
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26 #elif TARGET_API_MAC_CARBON && (UNIVERSAL_INTERFACES_VERSION > 0x0335) |
| 0 | 27 # include <Carbon.h> |
| 28 #else | |
| 29 # include <Sound.h> /* SoundManager interface */ | |
| 30 # include <Gestalt.h> | |
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31 # include <DriverServices.h> |
| 0 | 32 #endif |
| 33 | |
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34 #if !defined(NewSndCallBackUPP) && (UNIVERSAL_INTERFACES_VERSION < 0x0335) |
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35 #if !defined(NewSndCallBackProc) /* avoid circular redefinition... */ |
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36 #define NewSndCallBackUPP NewSndCallBackProc |
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37 #endif |
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38 #if !defined(NewSndCallBackUPP) |
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39 #define NewSndCallBackUPP NewSndCallBackProc |
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40 #endif |
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41 #endif |
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42 |
| 0 | 43 #include "SDL_audio.h" |
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44 #include "../SDL_audio_c.h" |
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45 #include "../SDL_sysaudio.h" |
| 0 | 46 #include "SDL_romaudio.h" |
| 47 | |
| 48 /* Audio driver functions */ | |
| 49 | |
| 50 static void Mac_CloseAudio(_THIS); | |
| 51 static int Mac_OpenAudio(_THIS, SDL_AudioSpec *spec); | |
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52 static void Mac_LockAudio(_THIS); |
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53 static void Mac_UnlockAudio(_THIS); |
| 0 | 54 |
| 55 /* Audio driver bootstrap functions */ | |
| 56 | |
| 57 | |
| 58 static int Audio_Available(void) | |
| 59 { | |
| 60 return(1); | |
| 61 } | |
| 62 | |
| 63 static void Audio_DeleteDevice(SDL_AudioDevice *device) | |
| 64 { | |
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65 SDL_free(device->hidden); |
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66 SDL_free(device); |
| 0 | 67 } |
| 68 | |
| 69 static SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 70 { | |
| 71 SDL_AudioDevice *this; | |
| 72 | |
| 73 /* Initialize all variables that we clean on shutdown */ | |
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74 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
| 0 | 75 if ( this ) { |
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76 SDL_memset(this, 0, (sizeof *this)); |
| 0 | 77 this->hidden = (struct SDL_PrivateAudioData *) |
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78 SDL_malloc((sizeof *this->hidden)); |
| 0 | 79 } |
| 80 if ( (this == NULL) || (this->hidden == NULL) ) { | |
| 81 SDL_OutOfMemory(); | |
| 82 if ( this ) { | |
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83 SDL_free(this); |
| 0 | 84 } |
| 85 return(0); | |
| 86 } | |
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87 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| 0 | 88 |
| 89 /* Set the function pointers */ | |
| 90 this->OpenAudio = Mac_OpenAudio; | |
| 91 this->CloseAudio = Mac_CloseAudio; | |
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92 this->LockAudio = Mac_LockAudio; |
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93 this->UnlockAudio = Mac_UnlockAudio; |
| 0 | 94 this->free = Audio_DeleteDevice; |
| 95 | |
| 1621 | 96 #ifdef __MACOSX__ /* Mac OS X uses threaded audio, so normal thread code is okay */ |
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97 this->LockAudio = NULL; |
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98 this->UnlockAudio = NULL; |
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99 #endif |
| 0 | 100 return this; |
| 101 } | |
| 102 | |
| 103 AudioBootStrap SNDMGR_bootstrap = { | |
| 104 "sndmgr", "MacOS SoundManager 3.0", | |
| 105 Audio_Available, Audio_CreateDevice | |
| 106 }; | |
| 107 | |
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108 #if defined(TARGET_API_MAC_CARBON) || defined(USE_RYANS_SOUNDCODE) |
| 1621 | 109 /* This works correctly on Mac OS X */ |
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110 |
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111 #pragma options align=power |
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112 |
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113 static volatile SInt32 audio_is_locked = 0; |
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114 static volatile SInt32 need_to_mix = 0; |
| 0 | 115 |
| 116 static UInt8 *buffer[2]; | |
| 117 static volatile UInt32 running = 0; | |
| 118 static CmpSoundHeader header; | |
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119 static volatile Uint32 fill_me = 0; |
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120 |
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121 static void mix_buffer(SDL_AudioDevice *audio, UInt8 *buffer) |
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122 { |
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123 if ( ! audio->paused ) { |
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124 #ifdef __MACOSX__ |
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125 SDL_mutexP(audio->mixer_lock); |
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126 #endif |
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127 if ( audio->convert.needed ) { |
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128 audio->spec.callback(audio->spec.userdata, |
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129 (Uint8 *)audio->convert.buf,audio->convert.len); |
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130 SDL_ConvertAudio(&audio->convert); |
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131 if ( audio->convert.len_cvt != audio->spec.size ) { |
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132 /* Uh oh... probably crashes here */; |
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133 } |
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134 SDL_memcpy(buffer, audio->convert.buf, audio->convert.len_cvt); |
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135 } else { |
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136 audio->spec.callback(audio->spec.userdata, buffer, audio->spec.size); |
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137 } |
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138 #ifdef __MACOSX__ |
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139 SDL_mutexV(audio->mixer_lock); |
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140 #endif |
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141 } |
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142 |
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143 DecrementAtomic((SInt32 *) &need_to_mix); |
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144 } |
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145 |
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146 static void Mac_LockAudio(_THIS) |
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147 { |
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148 IncrementAtomic((SInt32 *) &audio_is_locked); |
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149 } |
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150 |
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151 static void Mac_UnlockAudio(_THIS) |
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152 { |
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153 SInt32 oldval; |
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154 |
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155 oldval = DecrementAtomic((SInt32 *) &audio_is_locked); |
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156 if ( oldval != 1 ) /* != 1 means audio is still locked. */ |
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157 return; |
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158 |
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159 /* Did we miss the chance to mix in an interrupt? Do it now. */ |
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160 if ( BitAndAtomic (0xFFFFFFFF, (UInt32 *) &need_to_mix) ) { |
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161 /* |
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162 * Note that this could be a problem if you missed an interrupt |
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163 * while the audio was locked, and get preempted by a second |
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164 * interrupt here, but that means you locked for way too long anyhow. |
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165 */ |
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166 mix_buffer (this, buffer[fill_me]); |
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167 } |
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168 } |
| 0 | 169 |
| 170 static void callBackProc (SndChannel *chan, SndCommand *cmd_passed ) { | |
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171 UInt32 play_me; |
| 0 | 172 SndCommand cmd; |
| 173 SDL_AudioDevice *audio = (SDL_AudioDevice *)chan->userInfo; | |
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174 |
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175 IncrementAtomic((SInt32 *) &need_to_mix); |
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176 |
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177 fill_me = cmd_passed->param2; /* buffer that has just finished playing, so fill it */ |
| 0 | 178 play_me = ! fill_me; /* filled buffer to play _now_ */ |
| 179 | |
| 180 if ( ! audio->enabled ) { | |
| 181 return; | |
| 182 } | |
| 183 | |
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184 /* queue previously mixed buffer for playback. */ |
| 0 | 185 header.samplePtr = (Ptr)buffer[play_me]; |
| 186 cmd.cmd = bufferCmd; | |
| 187 cmd.param1 = 0; | |
| 188 cmd.param2 = (long)&header; | |
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189 SndDoCommand (chan, &cmd, 0); |
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190 |
| 0 | 191 memset (buffer[fill_me], 0, audio->spec.size); |
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192 |
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193 /* |
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194 * if audio device isn't locked, mix the next buffer to be queued in |
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195 * the memory block that just finished playing. |
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196 */ |
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197 if ( ! BitAndAtomic(0xFFFFFFFF, (UInt32 *) &audio_is_locked) ) { |
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198 mix_buffer (audio, buffer[fill_me]); |
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199 } |
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200 |
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201 /* set this callback to run again when current buffer drains. */ |
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202 if ( running ) { |
| 0 | 203 cmd.cmd = callBackCmd; |
| 204 cmd.param1 = 0; | |
| 205 cmd.param2 = play_me; | |
| 206 | |
| 207 SndDoCommand (chan, &cmd, 0); | |
| 208 } | |
| 209 } | |
| 210 | |
| 211 static int Mac_OpenAudio(_THIS, SDL_AudioSpec *spec) { | |
| 212 | |
| 213 SndCallBackUPP callback; | |
| 214 int sample_bits; | |
| 215 int i; | |
| 216 long initOptions; | |
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217 |
| 0 | 218 /* Very few conversions are required, but... */ |
| 219 switch (spec->format) { | |
| 220 case AUDIO_S8: | |
| 221 spec->format = AUDIO_U8; | |
| 222 break; | |
| 223 case AUDIO_U16LSB: | |
| 224 spec->format = AUDIO_S16LSB; | |
| 225 break; | |
| 226 case AUDIO_U16MSB: | |
| 227 spec->format = AUDIO_S16MSB; | |
| 228 break; | |
| 229 } | |
| 230 SDL_CalculateAudioSpec(spec); | |
| 231 | |
| 232 /* initialize bufferCmd header */ | |
| 233 memset (&header, 0, sizeof(header)); | |
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234 callback = (SndCallBackUPP) NewSndCallBackUPP (callBackProc); |
| 0 | 235 sample_bits = spec->size / spec->samples / spec->channels * 8; |
| 236 | |
| 237 #ifdef DEBUG_AUDIO | |
| 238 fprintf(stderr, | |
| 239 "Audio format 0x%x, channels = %d, sample_bits = %d, frequency = %d\n", | |
| 240 spec->format, spec->channels, sample_bits, spec->freq); | |
| 241 #endif /* DEBUG_AUDIO */ | |
| 242 | |
| 243 header.numChannels = spec->channels; | |
| 244 header.sampleSize = sample_bits; | |
| 245 header.sampleRate = spec->freq << 16; | |
| 246 header.numFrames = spec->samples; | |
| 247 header.encode = cmpSH; | |
| 248 | |
| 249 /* Note that we install the 16bitLittleEndian Converter if needed. */ | |
| 250 if ( spec->format == 0x8010 ) { | |
| 251 header.compressionID = fixedCompression; | |
| 252 header.format = k16BitLittleEndianFormat; | |
| 253 } | |
| 254 | |
| 255 /* allocate 2 buffers */ | |
| 256 for (i=0; i<2; i++) { | |
| 257 buffer[i] = (UInt8*)malloc (sizeof(UInt8) * spec->size); | |
| 258 if (buffer[i] == NULL) { | |
| 259 SDL_OutOfMemory(); | |
| 260 return (-1); | |
| 261 } | |
| 262 memset (buffer[i], 0, spec->size); | |
| 263 } | |
| 264 | |
| 265 /* Create the sound manager channel */ | |
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266 channel = (SndChannelPtr)SDL_malloc(sizeof(*channel)); |
| 0 | 267 if ( channel == NULL ) { |
| 268 SDL_OutOfMemory(); | |
| 269 return(-1); | |
| 270 } | |
| 271 if ( spec->channels >= 2 ) { | |
| 272 initOptions = initStereo; | |
| 273 } else { | |
| 274 initOptions = initMono; | |
| 275 } | |
| 276 channel->userInfo = (long)this; | |
| 277 channel->qLength = 128; | |
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278 if ( SndNewChannel(&channel, sampledSynth, initOptions, callback) != noErr ) { |
| 0 | 279 SDL_SetError("Unable to create audio channel"); |
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280 SDL_free(channel); |
| 0 | 281 channel = NULL; |
| 282 return(-1); | |
| 283 } | |
| 284 | |
| 285 /* start playback */ | |
| 286 { | |
| 287 SndCommand cmd; | |
| 288 cmd.cmd = callBackCmd; | |
| 289 cmd.param2 = 0; | |
| 290 running = 1; | |
| 291 SndDoCommand (channel, &cmd, 0); | |
| 292 } | |
| 293 | |
| 294 return 1; | |
| 295 } | |
| 296 | |
| 297 static void Mac_CloseAudio(_THIS) { | |
| 298 | |
| 299 int i; | |
| 300 | |
| 301 running = 0; | |
| 302 | |
| 303 if (channel) { | |
| 304 SndDisposeChannel (channel, true); | |
| 305 channel = NULL; | |
| 306 } | |
| 307 | |
| 308 for ( i=0; i<2; ++i ) { | |
| 309 if ( buffer[i] ) { | |
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310 SDL_free(buffer[i]); |
| 0 | 311 buffer[i] = NULL; |
| 312 } | |
| 313 } | |
| 314 } | |
| 315 | |
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316 #else /* !TARGET_API_MAC_CARBON && !USE_RYANS_SOUNDCODE */ |
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317 |
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318 static void Mac_LockAudio(_THIS) |
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319 { |
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320 /* no-op. */ |
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321 } |
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322 |
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323 static void Mac_UnlockAudio(_THIS) |
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324 { |
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325 /* no-op. */ |
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326 } |
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327 |
| 0 | 328 |
| 329 /* This function is called by Sound Manager when it has exhausted one of | |
| 330 the buffers, so we'll zero it to silence and fill it with audio if | |
| 331 we're not paused. | |
| 332 */ | |
| 333 static pascal | |
| 334 void sndDoubleBackProc (SndChannelPtr chan, SndDoubleBufferPtr newbuf) | |
| 335 { | |
| 336 SDL_AudioDevice *audio = (SDL_AudioDevice *)newbuf->dbUserInfo[0]; | |
| 337 | |
| 338 /* If audio is quitting, don't do anything */ | |
| 339 if ( ! audio->enabled ) { | |
| 340 return; | |
| 341 } | |
| 342 memset (newbuf->dbSoundData, 0, audio->spec.size); | |
| 343 newbuf->dbNumFrames = audio->spec.samples; | |
| 344 if ( ! audio->paused ) { | |
| 345 if ( audio->convert.needed ) { | |
| 346 audio->spec.callback(audio->spec.userdata, | |
| 347 (Uint8 *)audio->convert.buf,audio->convert.len); | |
| 348 SDL_ConvertAudio(&audio->convert); | |
| 349 #if 0 | |
| 350 if ( audio->convert.len_cvt != audio->spec.size ) { | |
| 351 /* Uh oh... probably crashes here */; | |
| 352 } | |
| 353 #endif | |
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354 SDL_memcpy(newbuf->dbSoundData, audio->convert.buf, |
| 0 | 355 audio->convert.len_cvt); |
| 356 } else { | |
| 357 audio->spec.callback(audio->spec.userdata, | |
| 358 (Uint8 *)newbuf->dbSoundData, audio->spec.size); | |
| 359 } | |
| 360 } | |
| 361 newbuf->dbFlags |= dbBufferReady; | |
| 362 } | |
| 363 | |
| 364 static int DoubleBufferAudio_Available(void) | |
| 365 { | |
| 366 int available; | |
| 367 NumVersion sndversion; | |
| 368 long response; | |
| 369 | |
| 370 available = 0; | |
| 371 sndversion = SndSoundManagerVersion(); | |
| 372 if ( sndversion.majorRev >= 3 ) { | |
| 373 if ( Gestalt(gestaltSoundAttr, &response) == noErr ) { | |
| 374 if ( (response & (1 << gestaltSndPlayDoubleBuffer)) ) { | |
| 375 available = 1; | |
| 376 } | |
| 377 } | |
| 378 } else { | |
| 379 if ( Gestalt(gestaltSoundAttr, &response) == noErr ) { | |
| 380 if ( (response & (1 << gestaltHasASC)) ) { | |
| 381 available = 1; | |
| 382 } | |
| 383 } | |
| 384 } | |
| 385 return(available); | |
| 386 } | |
| 387 | |
| 388 static void Mac_CloseAudio(_THIS) | |
| 389 { | |
| 390 int i; | |
| 391 | |
| 392 if ( channel != NULL ) { | |
| 393 /* Clean up the audio channel */ | |
| 394 SndDisposeChannel(channel, true); | |
| 395 channel = NULL; | |
| 396 } | |
| 397 for ( i=0; i<2; ++i ) { | |
| 398 if ( audio_buf[i] ) { | |
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399 SDL_free(audio_buf[i]); |
| 0 | 400 audio_buf[i] = NULL; |
| 401 } | |
| 402 } | |
| 403 } | |
| 404 | |
| 405 static int Mac_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 406 { | |
| 407 SndDoubleBufferHeader2 audio_dbh; | |
| 408 int i; | |
| 409 long initOptions; | |
| 410 int sample_bits; | |
| 411 SndDoubleBackUPP doubleBackProc; | |
| 412 | |
| 413 /* Check to make sure double-buffered audio is available */ | |
| 414 if ( ! DoubleBufferAudio_Available() ) { | |
| 415 SDL_SetError("Sound manager doesn't support double-buffering"); | |
| 416 return(-1); | |
| 417 } | |
| 418 | |
| 419 /* Very few conversions are required, but... */ | |
| 420 switch (spec->format) { | |
| 421 case AUDIO_S8: | |
| 422 spec->format = AUDIO_U8; | |
| 423 break; | |
| 424 case AUDIO_U16LSB: | |
| 425 spec->format = AUDIO_S16LSB; | |
| 426 break; | |
| 427 case AUDIO_U16MSB: | |
| 428 spec->format = AUDIO_S16MSB; | |
| 429 break; | |
| 430 } | |
| 431 SDL_CalculateAudioSpec(spec); | |
| 432 | |
| 433 /* initialize the double-back header */ | |
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434 SDL_memset(&audio_dbh, 0, sizeof(audio_dbh)); |
| 0 | 435 doubleBackProc = NewSndDoubleBackProc (sndDoubleBackProc); |
| 436 sample_bits = spec->size / spec->samples / spec->channels * 8; | |
| 437 | |
| 438 audio_dbh.dbhNumChannels = spec->channels; | |
| 439 audio_dbh.dbhSampleSize = sample_bits; | |
| 440 audio_dbh.dbhCompressionID = 0; | |
| 441 audio_dbh.dbhPacketSize = 0; | |
| 442 audio_dbh.dbhSampleRate = spec->freq << 16; | |
| 443 audio_dbh.dbhDoubleBack = doubleBackProc; | |
| 444 audio_dbh.dbhFormat = 0; | |
| 445 | |
| 446 /* Note that we install the 16bitLittleEndian Converter if needed. */ | |
| 447 if ( spec->format == 0x8010 ) { | |
| 448 audio_dbh.dbhCompressionID = fixedCompression; | |
| 449 audio_dbh.dbhFormat = k16BitLittleEndianFormat; | |
| 450 } | |
| 451 | |
| 452 /* allocate the 2 double-back buffers */ | |
| 453 for ( i=0; i<2; ++i ) { | |
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454 audio_buf[i] = SDL_calloc(1, sizeof(SndDoubleBuffer)+spec->size); |
| 0 | 455 if ( audio_buf[i] == NULL ) { |
| 456 SDL_OutOfMemory(); | |
| 457 return(-1); | |
| 458 } | |
| 459 audio_buf[i]->dbNumFrames = spec->samples; | |
| 460 audio_buf[i]->dbFlags = dbBufferReady; | |
| 461 audio_buf[i]->dbUserInfo[0] = (long)this; | |
| 462 audio_dbh.dbhBufferPtr[i] = audio_buf[i]; | |
| 463 } | |
| 464 | |
| 465 /* Create the sound manager channel */ | |
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466 channel = (SndChannelPtr)SDL_malloc(sizeof(*channel)); |
| 0 | 467 if ( channel == NULL ) { |
| 468 SDL_OutOfMemory(); | |
| 469 return(-1); | |
| 470 } | |
| 471 if ( spec->channels >= 2 ) { | |
| 472 initOptions = initStereo; | |
| 473 } else { | |
| 474 initOptions = initMono; | |
| 475 } | |
| 476 channel->userInfo = 0; | |
| 477 channel->qLength = 128; | |
| 478 if ( SndNewChannel(&channel, sampledSynth, initOptions, 0L) != noErr ) { | |
| 479 SDL_SetError("Unable to create audio channel"); | |
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480 SDL_free(channel); |
| 0 | 481 channel = NULL; |
| 482 return(-1); | |
| 483 } | |
| 484 | |
| 485 /* Start playback */ | |
| 486 if ( SndPlayDoubleBuffer(channel, (SndDoubleBufferHeaderPtr)&audio_dbh) | |
| 487 != noErr ) { | |
| 488 SDL_SetError("Unable to play double buffered audio"); | |
| 489 return(-1); | |
| 490 } | |
| 491 | |
| 492 return 1; | |
| 493 } | |
| 494 | |
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495 #endif /* TARGET_API_MAC_CARBON || USE_RYANS_SOUNDCODE */ |
| 0 | 496 |