Mercurial > sdl-ios-xcode
annotate src/audio/macrom/SDL_romaudio.c @ 1333:39b0d60d3f50
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| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 06 Feb 2006 08:58:44 +0000 |
| parents | c9b51268668f |
| children | 3692456e7b0f |
| 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 */ |
| 22 | |
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23 #if defined(__APPLE__) && defined(__MACH__) |
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24 # include <Carbon/Carbon.h> |
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25 #elif TARGET_API_MAC_CARBON && (UNIVERSAL_INTERFACES_VERSION > 0x0335) |
| 0 | 26 # include <Carbon.h> |
| 27 #else | |
| 28 # include <Sound.h> /* SoundManager interface */ | |
| 29 # include <Gestalt.h> | |
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30 # include <DriverServices.h> |
| 0 | 31 #endif |
| 32 | |
| 33 #include <stdlib.h> | |
| 34 #include <stdio.h> | |
| 35 | |
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36 #if !defined(NewSndCallBackUPP) && (UNIVERSAL_INTERFACES_VERSION < 0x0335) |
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37 #if !defined(NewSndCallBackProc) /* avoid circular redefinition... */ |
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38 #define NewSndCallBackUPP NewSndCallBackProc |
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39 #endif |
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40 #if !defined(NewSndCallBackUPP) |
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41 #define NewSndCallBackUPP NewSndCallBackProc |
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42 #endif |
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43 #endif |
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44 |
| 0 | 45 #include "SDL_endian.h" |
| 46 #include "SDL_audio.h" | |
| 47 #include "SDL_audio_c.h" | |
| 48 #include "SDL_audiomem.h" | |
| 49 #include "SDL_sysaudio.h" | |
| 50 #include "SDL_romaudio.h" | |
| 51 | |
| 52 /* Audio driver functions */ | |
| 53 | |
| 54 static void Mac_CloseAudio(_THIS); | |
| 55 static int Mac_OpenAudio(_THIS, SDL_AudioSpec *spec); | |
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56 static void Mac_LockAudio(_THIS); |
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57 static void Mac_UnlockAudio(_THIS); |
| 0 | 58 |
| 59 /* Audio driver bootstrap functions */ | |
| 60 | |
| 61 | |
| 62 static int Audio_Available(void) | |
| 63 { | |
| 64 return(1); | |
| 65 } | |
| 66 | |
| 67 static void Audio_DeleteDevice(SDL_AudioDevice *device) | |
| 68 { | |
| 69 free(device->hidden); | |
| 70 free(device); | |
| 71 } | |
| 72 | |
| 73 static SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 74 { | |
| 75 SDL_AudioDevice *this; | |
| 76 | |
| 77 /* Initialize all variables that we clean on shutdown */ | |
| 78 this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice)); | |
| 79 if ( this ) { | |
| 80 memset(this, 0, (sizeof *this)); | |
| 81 this->hidden = (struct SDL_PrivateAudioData *) | |
| 82 malloc((sizeof *this->hidden)); | |
| 83 } | |
| 84 if ( (this == NULL) || (this->hidden == NULL) ) { | |
| 85 SDL_OutOfMemory(); | |
| 86 if ( this ) { | |
| 87 free(this); | |
| 88 } | |
| 89 return(0); | |
| 90 } | |
| 91 memset(this->hidden, 0, (sizeof *this->hidden)); | |
| 92 | |
| 93 /* Set the function pointers */ | |
| 94 this->OpenAudio = Mac_OpenAudio; | |
| 95 this->CloseAudio = Mac_CloseAudio; | |
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96 this->LockAudio = Mac_LockAudio; |
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97 this->UnlockAudio = Mac_UnlockAudio; |
| 0 | 98 this->free = Audio_DeleteDevice; |
| 99 | |
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100 #ifdef MACOSX /* MacOS X uses threaded audio, so normal thread code is okay */ |
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101 this->LockAudio = NULL; |
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102 this->UnlockAudio = NULL; |
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103 #endif |
| 0 | 104 return this; |
| 105 } | |
| 106 | |
| 107 AudioBootStrap SNDMGR_bootstrap = { | |
| 108 "sndmgr", "MacOS SoundManager 3.0", | |
| 109 Audio_Available, Audio_CreateDevice | |
| 110 }; | |
| 111 | |
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112 #if defined(TARGET_API_MAC_CARBON) || defined(USE_RYANS_SOUNDCODE) |
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113 /* This works correctly on MacOS X */ |
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114 |
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115 #pragma options align=power |
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116 |
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117 static volatile SInt32 audio_is_locked = 0; |
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118 static volatile SInt32 need_to_mix = 0; |
| 0 | 119 |
| 120 static UInt8 *buffer[2]; | |
| 121 static volatile UInt32 running = 0; | |
| 122 static CmpSoundHeader header; | |
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123 static volatile Uint32 fill_me = 0; |
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124 |
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125 static void mix_buffer(SDL_AudioDevice *audio, UInt8 *buffer) |
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126 { |
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127 if ( ! audio->paused ) { |
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128 #ifdef MACOSX |
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129 SDL_mutexP(audio->mixer_lock); |
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130 #endif |
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131 if ( audio->convert.needed ) { |
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132 audio->spec.callback(audio->spec.userdata, |
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133 (Uint8 *)audio->convert.buf,audio->convert.len); |
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134 SDL_ConvertAudio(&audio->convert); |
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135 if ( audio->convert.len_cvt != audio->spec.size ) { |
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136 /* Uh oh... probably crashes here */; |
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137 } |
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138 memcpy(buffer, audio->convert.buf, audio->convert.len_cvt); |
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139 } else { |
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140 audio->spec.callback(audio->spec.userdata, buffer, audio->spec.size); |
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141 } |
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142 #ifdef MACOSX |
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143 SDL_mutexV(audio->mixer_lock); |
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144 #endif |
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145 } |
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146 |
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147 DecrementAtomic((SInt32 *) &need_to_mix); |
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148 } |
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149 |
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150 static void Mac_LockAudio(_THIS) |
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151 { |
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152 IncrementAtomic((SInt32 *) &audio_is_locked); |
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153 } |
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154 |
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155 static void Mac_UnlockAudio(_THIS) |
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156 { |
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157 SInt32 oldval; |
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158 |
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159 oldval = DecrementAtomic((SInt32 *) &audio_is_locked); |
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160 if ( oldval != 1 ) /* != 1 means audio is still locked. */ |
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161 return; |
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162 |
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163 /* Did we miss the chance to mix in an interrupt? Do it now. */ |
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164 if ( BitAndAtomic (0xFFFFFFFF, (UInt32 *) &need_to_mix) ) { |
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165 /* |
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166 * Note that this could be a problem if you missed an interrupt |
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167 * while the audio was locked, and get preempted by a second |
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168 * interrupt here, but that means you locked for way too long anyhow. |
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169 */ |
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170 mix_buffer (this, buffer[fill_me]); |
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171 } |
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172 } |
| 0 | 173 |
| 174 static void callBackProc (SndChannel *chan, SndCommand *cmd_passed ) { | |
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175 UInt32 play_me; |
| 0 | 176 SndCommand cmd; |
| 177 SDL_AudioDevice *audio = (SDL_AudioDevice *)chan->userInfo; | |
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178 |
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179 IncrementAtomic((SInt32 *) &need_to_mix); |
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180 |
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181 fill_me = cmd_passed->param2; /* buffer that has just finished playing, so fill it */ |
| 0 | 182 play_me = ! fill_me; /* filled buffer to play _now_ */ |
| 183 | |
| 184 if ( ! audio->enabled ) { | |
| 185 return; | |
| 186 } | |
| 187 | |
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188 /* queue previously mixed buffer for playback. */ |
| 0 | 189 header.samplePtr = (Ptr)buffer[play_me]; |
| 190 cmd.cmd = bufferCmd; | |
| 191 cmd.param1 = 0; | |
| 192 cmd.param2 = (long)&header; | |
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193 SndDoCommand (chan, &cmd, 0); |
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194 |
| 0 | 195 memset (buffer[fill_me], 0, audio->spec.size); |
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196 |
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197 /* |
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198 * if audio device isn't locked, mix the next buffer to be queued in |
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199 * the memory block that just finished playing. |
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200 */ |
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201 if ( ! BitAndAtomic(0xFFFFFFFF, (UInt32 *) &audio_is_locked) ) { |
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202 mix_buffer (audio, buffer[fill_me]); |
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203 } |
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204 |
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205 /* set this callback to run again when current buffer drains. */ |
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206 if ( running ) { |
| 0 | 207 cmd.cmd = callBackCmd; |
| 208 cmd.param1 = 0; | |
| 209 cmd.param2 = play_me; | |
| 210 | |
| 211 SndDoCommand (chan, &cmd, 0); | |
| 212 } | |
| 213 } | |
| 214 | |
| 215 static int Mac_OpenAudio(_THIS, SDL_AudioSpec *spec) { | |
| 216 | |
| 217 SndCallBackUPP callback; | |
| 218 int sample_bits; | |
| 219 int i; | |
| 220 long initOptions; | |
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221 |
| 0 | 222 /* Very few conversions are required, but... */ |
| 223 switch (spec->format) { | |
| 224 case AUDIO_S8: | |
| 225 spec->format = AUDIO_U8; | |
| 226 break; | |
| 227 case AUDIO_U16LSB: | |
| 228 spec->format = AUDIO_S16LSB; | |
| 229 break; | |
| 230 case AUDIO_U16MSB: | |
| 231 spec->format = AUDIO_S16MSB; | |
| 232 break; | |
| 233 } | |
| 234 SDL_CalculateAudioSpec(spec); | |
| 235 | |
| 236 /* initialize bufferCmd header */ | |
| 237 memset (&header, 0, sizeof(header)); | |
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238 callback = (SndCallBackUPP) NewSndCallBackUPP (callBackProc); |
| 0 | 239 sample_bits = spec->size / spec->samples / spec->channels * 8; |
| 240 | |
| 241 #ifdef DEBUG_AUDIO | |
| 242 fprintf(stderr, | |
| 243 "Audio format 0x%x, channels = %d, sample_bits = %d, frequency = %d\n", | |
| 244 spec->format, spec->channels, sample_bits, spec->freq); | |
| 245 #endif /* DEBUG_AUDIO */ | |
| 246 | |
| 247 header.numChannels = spec->channels; | |
| 248 header.sampleSize = sample_bits; | |
| 249 header.sampleRate = spec->freq << 16; | |
| 250 header.numFrames = spec->samples; | |
| 251 header.encode = cmpSH; | |
| 252 | |
| 253 /* Note that we install the 16bitLittleEndian Converter if needed. */ | |
| 254 if ( spec->format == 0x8010 ) { | |
| 255 header.compressionID = fixedCompression; | |
| 256 header.format = k16BitLittleEndianFormat; | |
| 257 } | |
| 258 | |
| 259 /* allocate 2 buffers */ | |
| 260 for (i=0; i<2; i++) { | |
| 261 buffer[i] = (UInt8*)malloc (sizeof(UInt8) * spec->size); | |
| 262 if (buffer[i] == NULL) { | |
| 263 SDL_OutOfMemory(); | |
| 264 return (-1); | |
| 265 } | |
| 266 memset (buffer[i], 0, spec->size); | |
| 267 } | |
| 268 | |
| 269 /* Create the sound manager channel */ | |
| 270 channel = (SndChannelPtr)malloc(sizeof(*channel)); | |
| 271 if ( channel == NULL ) { | |
| 272 SDL_OutOfMemory(); | |
| 273 return(-1); | |
| 274 } | |
| 275 if ( spec->channels >= 2 ) { | |
| 276 initOptions = initStereo; | |
| 277 } else { | |
| 278 initOptions = initMono; | |
| 279 } | |
| 280 channel->userInfo = (long)this; | |
| 281 channel->qLength = 128; | |
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282 if ( SndNewChannel(&channel, sampledSynth, initOptions, callback) != noErr ) { |
| 0 | 283 SDL_SetError("Unable to create audio channel"); |
| 284 free(channel); | |
| 285 channel = NULL; | |
| 286 return(-1); | |
| 287 } | |
| 288 | |
| 289 /* start playback */ | |
| 290 { | |
| 291 SndCommand cmd; | |
| 292 cmd.cmd = callBackCmd; | |
| 293 cmd.param2 = 0; | |
| 294 running = 1; | |
| 295 SndDoCommand (channel, &cmd, 0); | |
| 296 } | |
| 297 | |
| 298 return 1; | |
| 299 } | |
| 300 | |
| 301 static void Mac_CloseAudio(_THIS) { | |
| 302 | |
| 303 int i; | |
| 304 | |
| 305 running = 0; | |
| 306 | |
| 307 if (channel) { | |
| 308 SndDisposeChannel (channel, true); | |
| 309 channel = NULL; | |
| 310 } | |
| 311 | |
| 312 for ( i=0; i<2; ++i ) { | |
| 313 if ( buffer[i] ) { | |
| 314 free(buffer[i]); | |
| 315 buffer[i] = NULL; | |
| 316 } | |
| 317 } | |
| 318 } | |
| 319 | |
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320 #else /* !TARGET_API_MAC_CARBON && !USE_RYANS_SOUNDCODE */ |
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321 |
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322 static void Mac_LockAudio(_THIS) |
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323 { |
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324 /* no-op. */ |
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325 } |
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326 |
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327 static void Mac_UnlockAudio(_THIS) |
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328 { |
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329 /* no-op. */ |
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330 } |
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331 |
| 0 | 332 |
| 333 /* This function is called by Sound Manager when it has exhausted one of | |
| 334 the buffers, so we'll zero it to silence and fill it with audio if | |
| 335 we're not paused. | |
| 336 */ | |
| 337 static pascal | |
| 338 void sndDoubleBackProc (SndChannelPtr chan, SndDoubleBufferPtr newbuf) | |
| 339 { | |
| 340 SDL_AudioDevice *audio = (SDL_AudioDevice *)newbuf->dbUserInfo[0]; | |
| 341 | |
| 342 /* If audio is quitting, don't do anything */ | |
| 343 if ( ! audio->enabled ) { | |
| 344 return; | |
| 345 } | |
| 346 memset (newbuf->dbSoundData, 0, audio->spec.size); | |
| 347 newbuf->dbNumFrames = audio->spec.samples; | |
| 348 if ( ! audio->paused ) { | |
| 349 if ( audio->convert.needed ) { | |
| 350 audio->spec.callback(audio->spec.userdata, | |
| 351 (Uint8 *)audio->convert.buf,audio->convert.len); | |
| 352 SDL_ConvertAudio(&audio->convert); | |
| 353 #if 0 | |
| 354 if ( audio->convert.len_cvt != audio->spec.size ) { | |
| 355 /* Uh oh... probably crashes here */; | |
| 356 } | |
| 357 #endif | |
| 358 memcpy(newbuf->dbSoundData, audio->convert.buf, | |
| 359 audio->convert.len_cvt); | |
| 360 } else { | |
| 361 audio->spec.callback(audio->spec.userdata, | |
| 362 (Uint8 *)newbuf->dbSoundData, audio->spec.size); | |
| 363 } | |
| 364 } | |
| 365 newbuf->dbFlags |= dbBufferReady; | |
| 366 } | |
| 367 | |
| 368 static int DoubleBufferAudio_Available(void) | |
| 369 { | |
| 370 int available; | |
| 371 NumVersion sndversion; | |
| 372 long response; | |
| 373 | |
| 374 available = 0; | |
| 375 sndversion = SndSoundManagerVersion(); | |
| 376 if ( sndversion.majorRev >= 3 ) { | |
| 377 if ( Gestalt(gestaltSoundAttr, &response) == noErr ) { | |
| 378 if ( (response & (1 << gestaltSndPlayDoubleBuffer)) ) { | |
| 379 available = 1; | |
| 380 } | |
| 381 } | |
| 382 } else { | |
| 383 if ( Gestalt(gestaltSoundAttr, &response) == noErr ) { | |
| 384 if ( (response & (1 << gestaltHasASC)) ) { | |
| 385 available = 1; | |
| 386 } | |
| 387 } | |
| 388 } | |
| 389 return(available); | |
| 390 } | |
| 391 | |
| 392 static void Mac_CloseAudio(_THIS) | |
| 393 { | |
| 394 int i; | |
| 395 | |
| 396 if ( channel != NULL ) { | |
| 397 /* Clean up the audio channel */ | |
| 398 SndDisposeChannel(channel, true); | |
| 399 channel = NULL; | |
| 400 } | |
| 401 for ( i=0; i<2; ++i ) { | |
| 402 if ( audio_buf[i] ) { | |
| 403 free(audio_buf[i]); | |
| 404 audio_buf[i] = NULL; | |
| 405 } | |
| 406 } | |
| 407 } | |
| 408 | |
| 409 static int Mac_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 410 { | |
| 411 SndDoubleBufferHeader2 audio_dbh; | |
| 412 int i; | |
| 413 long initOptions; | |
| 414 int sample_bits; | |
| 415 SndDoubleBackUPP doubleBackProc; | |
| 416 | |
| 417 /* Check to make sure double-buffered audio is available */ | |
| 418 if ( ! DoubleBufferAudio_Available() ) { | |
| 419 SDL_SetError("Sound manager doesn't support double-buffering"); | |
| 420 return(-1); | |
| 421 } | |
| 422 | |
| 423 /* Very few conversions are required, but... */ | |
| 424 switch (spec->format) { | |
| 425 case AUDIO_S8: | |
| 426 spec->format = AUDIO_U8; | |
| 427 break; | |
| 428 case AUDIO_U16LSB: | |
| 429 spec->format = AUDIO_S16LSB; | |
| 430 break; | |
| 431 case AUDIO_U16MSB: | |
| 432 spec->format = AUDIO_S16MSB; | |
| 433 break; | |
| 434 } | |
| 435 SDL_CalculateAudioSpec(spec); | |
| 436 | |
| 437 /* initialize the double-back header */ | |
| 438 memset(&audio_dbh, 0, sizeof(audio_dbh)); | |
| 439 doubleBackProc = NewSndDoubleBackProc (sndDoubleBackProc); | |
| 440 sample_bits = spec->size / spec->samples / spec->channels * 8; | |
| 441 | |
| 442 audio_dbh.dbhNumChannels = spec->channels; | |
| 443 audio_dbh.dbhSampleSize = sample_bits; | |
| 444 audio_dbh.dbhCompressionID = 0; | |
| 445 audio_dbh.dbhPacketSize = 0; | |
| 446 audio_dbh.dbhSampleRate = spec->freq << 16; | |
| 447 audio_dbh.dbhDoubleBack = doubleBackProc; | |
| 448 audio_dbh.dbhFormat = 0; | |
| 449 | |
| 450 /* Note that we install the 16bitLittleEndian Converter if needed. */ | |
| 451 if ( spec->format == 0x8010 ) { | |
| 452 audio_dbh.dbhCompressionID = fixedCompression; | |
| 453 audio_dbh.dbhFormat = k16BitLittleEndianFormat; | |
| 454 } | |
| 455 | |
| 456 /* allocate the 2 double-back buffers */ | |
| 457 for ( i=0; i<2; ++i ) { | |
| 458 audio_buf[i] = calloc(1, sizeof(SndDoubleBuffer)+spec->size); | |
| 459 if ( audio_buf[i] == NULL ) { | |
| 460 SDL_OutOfMemory(); | |
| 461 return(-1); | |
| 462 } | |
| 463 audio_buf[i]->dbNumFrames = spec->samples; | |
| 464 audio_buf[i]->dbFlags = dbBufferReady; | |
| 465 audio_buf[i]->dbUserInfo[0] = (long)this; | |
| 466 audio_dbh.dbhBufferPtr[i] = audio_buf[i]; | |
| 467 } | |
| 468 | |
| 469 /* Create the sound manager channel */ | |
| 470 channel = (SndChannelPtr)malloc(sizeof(*channel)); | |
| 471 if ( channel == NULL ) { | |
| 472 SDL_OutOfMemory(); | |
| 473 return(-1); | |
| 474 } | |
| 475 if ( spec->channels >= 2 ) { | |
| 476 initOptions = initStereo; | |
| 477 } else { | |
| 478 initOptions = initMono; | |
| 479 } | |
| 480 channel->userInfo = 0; | |
| 481 channel->qLength = 128; | |
| 482 if ( SndNewChannel(&channel, sampledSynth, initOptions, 0L) != noErr ) { | |
| 483 SDL_SetError("Unable to create audio channel"); | |
| 484 free(channel); | |
| 485 channel = NULL; | |
| 486 return(-1); | |
| 487 } | |
| 488 | |
| 489 /* Start playback */ | |
| 490 if ( SndPlayDoubleBuffer(channel, (SndDoubleBufferHeaderPtr)&audio_dbh) | |
| 491 != noErr ) { | |
| 492 SDL_SetError("Unable to play double buffered audio"); | |
| 493 return(-1); | |
| 494 } | |
| 495 | |
| 496 return 1; | |
| 497 } | |
| 498 | |
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499 #endif /* TARGET_API_MAC_CARBON || USE_RYANS_SOUNDCODE */ |
| 0 | 500 |