Mercurial > sdl-ios-xcode
annotate src/audio/macrom/SDL_romaudio.c @ 1198:b616ac4f39d1
Fixed gcc 4 warnings
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 08 Dec 2005 14:48:21 +0000 |
| parents | cf6133247d34 |
| children | c9b51268668f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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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 | |
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28 #if defined(__APPLE__) && defined(__MACH__) |
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29 # include <Carbon/Carbon.h> |
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30 #elif TARGET_API_MAC_CARBON && (UNIVERSAL_INTERFACES_VERSION > 0x0335) |
| 0 | 31 # include <Carbon.h> |
| 32 #else | |
| 33 # include <Sound.h> /* SoundManager interface */ | |
| 34 # include <Gestalt.h> | |
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35 # include <DriverServices.h> |
| 0 | 36 #endif |
| 37 | |
| 38 #include <stdlib.h> | |
| 39 #include <stdio.h> | |
| 40 | |
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41 #if !defined(NewSndCallBackUPP) && (UNIVERSAL_INTERFACES_VERSION < 0x0335) |
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42 #if !defined(NewSndCallBackProc) /* avoid circular redefinition... */ |
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43 #define NewSndCallBackUPP NewSndCallBackProc |
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44 #endif |
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45 #if !defined(NewSndCallBackUPP) |
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46 #define NewSndCallBackUPP NewSndCallBackProc |
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47 #endif |
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48 #endif |
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49 |
| 0 | 50 #include "SDL_endian.h" |
| 51 #include "SDL_audio.h" | |
| 52 #include "SDL_audio_c.h" | |
| 53 #include "SDL_audiomem.h" | |
| 54 #include "SDL_sysaudio.h" | |
| 55 #include "SDL_romaudio.h" | |
| 56 | |
| 57 /* Audio driver functions */ | |
| 58 | |
| 59 static void Mac_CloseAudio(_THIS); | |
| 60 static int Mac_OpenAudio(_THIS, SDL_AudioSpec *spec); | |
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61 static void Mac_LockAudio(_THIS); |
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62 static void Mac_UnlockAudio(_THIS); |
| 0 | 63 |
| 64 /* Audio driver bootstrap functions */ | |
| 65 | |
| 66 | |
| 67 static int Audio_Available(void) | |
| 68 { | |
| 69 return(1); | |
| 70 } | |
| 71 | |
| 72 static void Audio_DeleteDevice(SDL_AudioDevice *device) | |
| 73 { | |
| 74 free(device->hidden); | |
| 75 free(device); | |
| 76 } | |
| 77 | |
| 78 static SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 79 { | |
| 80 SDL_AudioDevice *this; | |
| 81 | |
| 82 /* Initialize all variables that we clean on shutdown */ | |
| 83 this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice)); | |
| 84 if ( this ) { | |
| 85 memset(this, 0, (sizeof *this)); | |
| 86 this->hidden = (struct SDL_PrivateAudioData *) | |
| 87 malloc((sizeof *this->hidden)); | |
| 88 } | |
| 89 if ( (this == NULL) || (this->hidden == NULL) ) { | |
| 90 SDL_OutOfMemory(); | |
| 91 if ( this ) { | |
| 92 free(this); | |
| 93 } | |
| 94 return(0); | |
| 95 } | |
| 96 memset(this->hidden, 0, (sizeof *this->hidden)); | |
| 97 | |
| 98 /* Set the function pointers */ | |
| 99 this->OpenAudio = Mac_OpenAudio; | |
| 100 this->CloseAudio = Mac_CloseAudio; | |
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101 this->LockAudio = Mac_LockAudio; |
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102 this->UnlockAudio = Mac_UnlockAudio; |
| 0 | 103 this->free = Audio_DeleteDevice; |
| 104 | |
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105 #ifdef MACOSX /* MacOS X uses threaded audio, so normal thread code is okay */ |
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106 this->LockAudio = NULL; |
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107 this->UnlockAudio = NULL; |
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108 #endif |
| 0 | 109 return this; |
| 110 } | |
| 111 | |
| 112 AudioBootStrap SNDMGR_bootstrap = { | |
| 113 "sndmgr", "MacOS SoundManager 3.0", | |
| 114 Audio_Available, Audio_CreateDevice | |
| 115 }; | |
| 116 | |
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117 #if defined(TARGET_API_MAC_CARBON) || defined(USE_RYANS_SOUNDCODE) |
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118 /* This works correctly on MacOS X */ |
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119 |
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120 #pragma options align=power |
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121 |
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122 static volatile SInt32 audio_is_locked = 0; |
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123 static volatile SInt32 need_to_mix = 0; |
| 0 | 124 |
| 125 static UInt8 *buffer[2]; | |
| 126 static volatile UInt32 running = 0; | |
| 127 static CmpSoundHeader header; | |
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128 static volatile Uint32 fill_me = 0; |
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129 |
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130 static void mix_buffer(SDL_AudioDevice *audio, UInt8 *buffer) |
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131 { |
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132 if ( ! audio->paused ) { |
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133 #ifdef MACOSX |
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134 SDL_mutexP(audio->mixer_lock); |
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135 #endif |
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136 if ( audio->convert.needed ) { |
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137 audio->spec.callback(audio->spec.userdata, |
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138 (Uint8 *)audio->convert.buf,audio->convert.len); |
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139 SDL_ConvertAudio(&audio->convert); |
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140 if ( audio->convert.len_cvt != audio->spec.size ) { |
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141 /* Uh oh... probably crashes here */; |
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142 } |
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143 memcpy(buffer, audio->convert.buf, audio->convert.len_cvt); |
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144 } else { |
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145 audio->spec.callback(audio->spec.userdata, buffer, audio->spec.size); |
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146 } |
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147 #ifdef MACOSX |
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148 SDL_mutexV(audio->mixer_lock); |
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149 #endif |
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150 } |
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151 |
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152 DecrementAtomic((SInt32 *) &need_to_mix); |
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153 } |
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154 |
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155 static void Mac_LockAudio(_THIS) |
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156 { |
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157 IncrementAtomic((SInt32 *) &audio_is_locked); |
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158 } |
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159 |
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160 static void Mac_UnlockAudio(_THIS) |
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161 { |
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162 SInt32 oldval; |
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163 |
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164 oldval = DecrementAtomic((SInt32 *) &audio_is_locked); |
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165 if ( oldval != 1 ) /* != 1 means audio is still locked. */ |
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166 return; |
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167 |
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168 /* Did we miss the chance to mix in an interrupt? Do it now. */ |
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169 if ( BitAndAtomic (0xFFFFFFFF, (UInt32 *) &need_to_mix) ) { |
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170 /* |
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171 * Note that this could be a problem if you missed an interrupt |
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172 * while the audio was locked, and get preempted by a second |
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173 * interrupt here, but that means you locked for way too long anyhow. |
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174 */ |
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175 mix_buffer (this, buffer[fill_me]); |
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176 } |
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177 } |
| 0 | 178 |
| 179 static void callBackProc (SndChannel *chan, SndCommand *cmd_passed ) { | |
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180 UInt32 play_me; |
| 0 | 181 SndCommand cmd; |
| 182 SDL_AudioDevice *audio = (SDL_AudioDevice *)chan->userInfo; | |
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183 |
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184 IncrementAtomic((SInt32 *) &need_to_mix); |
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185 |
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186 fill_me = cmd_passed->param2; /* buffer that has just finished playing, so fill it */ |
| 0 | 187 play_me = ! fill_me; /* filled buffer to play _now_ */ |
| 188 | |
| 189 if ( ! audio->enabled ) { | |
| 190 return; | |
| 191 } | |
| 192 | |
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193 /* queue previously mixed buffer for playback. */ |
| 0 | 194 header.samplePtr = (Ptr)buffer[play_me]; |
| 195 cmd.cmd = bufferCmd; | |
| 196 cmd.param1 = 0; | |
| 197 cmd.param2 = (long)&header; | |
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198 SndDoCommand (chan, &cmd, 0); |
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199 |
| 0 | 200 memset (buffer[fill_me], 0, audio->spec.size); |
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201 |
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202 /* |
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203 * if audio device isn't locked, mix the next buffer to be queued in |
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204 * the memory block that just finished playing. |
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205 */ |
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206 if ( ! BitAndAtomic(0xFFFFFFFF, (UInt32 *) &audio_is_locked) ) { |
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207 mix_buffer (audio, buffer[fill_me]); |
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208 } |
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209 |
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210 /* set this callback to run again when current buffer drains. */ |
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211 if ( running ) { |
| 0 | 212 cmd.cmd = callBackCmd; |
| 213 cmd.param1 = 0; | |
| 214 cmd.param2 = play_me; | |
| 215 | |
| 216 SndDoCommand (chan, &cmd, 0); | |
| 217 } | |
| 218 } | |
| 219 | |
| 220 static int Mac_OpenAudio(_THIS, SDL_AudioSpec *spec) { | |
| 221 | |
| 222 SndCallBackUPP callback; | |
| 223 int sample_bits; | |
| 224 int i; | |
| 225 long initOptions; | |
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226 |
| 0 | 227 /* Very few conversions are required, but... */ |
| 228 switch (spec->format) { | |
| 229 case AUDIO_S8: | |
| 230 spec->format = AUDIO_U8; | |
| 231 break; | |
| 232 case AUDIO_U16LSB: | |
| 233 spec->format = AUDIO_S16LSB; | |
| 234 break; | |
| 235 case AUDIO_U16MSB: | |
| 236 spec->format = AUDIO_S16MSB; | |
| 237 break; | |
| 238 } | |
| 239 SDL_CalculateAudioSpec(spec); | |
| 240 | |
| 241 /* initialize bufferCmd header */ | |
| 242 memset (&header, 0, sizeof(header)); | |
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243 callback = (SndCallBackUPP) NewSndCallBackUPP (callBackProc); |
| 0 | 244 sample_bits = spec->size / spec->samples / spec->channels * 8; |
| 245 | |
| 246 #ifdef DEBUG_AUDIO | |
| 247 fprintf(stderr, | |
| 248 "Audio format 0x%x, channels = %d, sample_bits = %d, frequency = %d\n", | |
| 249 spec->format, spec->channels, sample_bits, spec->freq); | |
| 250 #endif /* DEBUG_AUDIO */ | |
| 251 | |
| 252 header.numChannels = spec->channels; | |
| 253 header.sampleSize = sample_bits; | |
| 254 header.sampleRate = spec->freq << 16; | |
| 255 header.numFrames = spec->samples; | |
| 256 header.encode = cmpSH; | |
| 257 | |
| 258 /* Note that we install the 16bitLittleEndian Converter if needed. */ | |
| 259 if ( spec->format == 0x8010 ) { | |
| 260 header.compressionID = fixedCompression; | |
| 261 header.format = k16BitLittleEndianFormat; | |
| 262 } | |
| 263 | |
| 264 /* allocate 2 buffers */ | |
| 265 for (i=0; i<2; i++) { | |
| 266 buffer[i] = (UInt8*)malloc (sizeof(UInt8) * spec->size); | |
| 267 if (buffer[i] == NULL) { | |
| 268 SDL_OutOfMemory(); | |
| 269 return (-1); | |
| 270 } | |
| 271 memset (buffer[i], 0, spec->size); | |
| 272 } | |
| 273 | |
| 274 /* Create the sound manager channel */ | |
| 275 channel = (SndChannelPtr)malloc(sizeof(*channel)); | |
| 276 if ( channel == NULL ) { | |
| 277 SDL_OutOfMemory(); | |
| 278 return(-1); | |
| 279 } | |
| 280 if ( spec->channels >= 2 ) { | |
| 281 initOptions = initStereo; | |
| 282 } else { | |
| 283 initOptions = initMono; | |
| 284 } | |
| 285 channel->userInfo = (long)this; | |
| 286 channel->qLength = 128; | |
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287 if ( SndNewChannel(&channel, sampledSynth, initOptions, callback) != noErr ) { |
| 0 | 288 SDL_SetError("Unable to create audio channel"); |
| 289 free(channel); | |
| 290 channel = NULL; | |
| 291 return(-1); | |
| 292 } | |
| 293 | |
| 294 /* start playback */ | |
| 295 { | |
| 296 SndCommand cmd; | |
| 297 cmd.cmd = callBackCmd; | |
| 298 cmd.param2 = 0; | |
| 299 running = 1; | |
| 300 SndDoCommand (channel, &cmd, 0); | |
| 301 } | |
| 302 | |
| 303 return 1; | |
| 304 } | |
| 305 | |
| 306 static void Mac_CloseAudio(_THIS) { | |
| 307 | |
| 308 int i; | |
| 309 | |
| 310 running = 0; | |
| 311 | |
| 312 if (channel) { | |
| 313 SndDisposeChannel (channel, true); | |
| 314 channel = NULL; | |
| 315 } | |
| 316 | |
| 317 for ( i=0; i<2; ++i ) { | |
| 318 if ( buffer[i] ) { | |
| 319 free(buffer[i]); | |
| 320 buffer[i] = NULL; | |
| 321 } | |
| 322 } | |
| 323 } | |
| 324 | |
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325 #else /* !TARGET_API_MAC_CARBON && !USE_RYANS_SOUNDCODE */ |
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326 |
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327 static void Mac_LockAudio(_THIS) |
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328 { |
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329 /* no-op. */ |
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330 } |
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331 |
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332 static void Mac_UnlockAudio(_THIS) |
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333 { |
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334 /* no-op. */ |
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335 } |
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336 |
| 0 | 337 |
| 338 /* This function is called by Sound Manager when it has exhausted one of | |
| 339 the buffers, so we'll zero it to silence and fill it with audio if | |
| 340 we're not paused. | |
| 341 */ | |
| 342 static pascal | |
| 343 void sndDoubleBackProc (SndChannelPtr chan, SndDoubleBufferPtr newbuf) | |
| 344 { | |
| 345 SDL_AudioDevice *audio = (SDL_AudioDevice *)newbuf->dbUserInfo[0]; | |
| 346 | |
| 347 /* If audio is quitting, don't do anything */ | |
| 348 if ( ! audio->enabled ) { | |
| 349 return; | |
| 350 } | |
| 351 memset (newbuf->dbSoundData, 0, audio->spec.size); | |
| 352 newbuf->dbNumFrames = audio->spec.samples; | |
| 353 if ( ! audio->paused ) { | |
| 354 if ( audio->convert.needed ) { | |
| 355 audio->spec.callback(audio->spec.userdata, | |
| 356 (Uint8 *)audio->convert.buf,audio->convert.len); | |
| 357 SDL_ConvertAudio(&audio->convert); | |
| 358 #if 0 | |
| 359 if ( audio->convert.len_cvt != audio->spec.size ) { | |
| 360 /* Uh oh... probably crashes here */; | |
| 361 } | |
| 362 #endif | |
| 363 memcpy(newbuf->dbSoundData, audio->convert.buf, | |
| 364 audio->convert.len_cvt); | |
| 365 } else { | |
| 366 audio->spec.callback(audio->spec.userdata, | |
| 367 (Uint8 *)newbuf->dbSoundData, audio->spec.size); | |
| 368 } | |
| 369 } | |
| 370 newbuf->dbFlags |= dbBufferReady; | |
| 371 } | |
| 372 | |
| 373 static int DoubleBufferAudio_Available(void) | |
| 374 { | |
| 375 int available; | |
| 376 NumVersion sndversion; | |
| 377 long response; | |
| 378 | |
| 379 available = 0; | |
| 380 sndversion = SndSoundManagerVersion(); | |
| 381 if ( sndversion.majorRev >= 3 ) { | |
| 382 if ( Gestalt(gestaltSoundAttr, &response) == noErr ) { | |
| 383 if ( (response & (1 << gestaltSndPlayDoubleBuffer)) ) { | |
| 384 available = 1; | |
| 385 } | |
| 386 } | |
| 387 } else { | |
| 388 if ( Gestalt(gestaltSoundAttr, &response) == noErr ) { | |
| 389 if ( (response & (1 << gestaltHasASC)) ) { | |
| 390 available = 1; | |
| 391 } | |
| 392 } | |
| 393 } | |
| 394 return(available); | |
| 395 } | |
| 396 | |
| 397 static void Mac_CloseAudio(_THIS) | |
| 398 { | |
| 399 int i; | |
| 400 | |
| 401 if ( channel != NULL ) { | |
| 402 /* Clean up the audio channel */ | |
| 403 SndDisposeChannel(channel, true); | |
| 404 channel = NULL; | |
| 405 } | |
| 406 for ( i=0; i<2; ++i ) { | |
| 407 if ( audio_buf[i] ) { | |
| 408 free(audio_buf[i]); | |
| 409 audio_buf[i] = NULL; | |
| 410 } | |
| 411 } | |
| 412 } | |
| 413 | |
| 414 static int Mac_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 415 { | |
| 416 SndDoubleBufferHeader2 audio_dbh; | |
| 417 int i; | |
| 418 long initOptions; | |
| 419 int sample_bits; | |
| 420 SndDoubleBackUPP doubleBackProc; | |
| 421 | |
| 422 /* Check to make sure double-buffered audio is available */ | |
| 423 if ( ! DoubleBufferAudio_Available() ) { | |
| 424 SDL_SetError("Sound manager doesn't support double-buffering"); | |
| 425 return(-1); | |
| 426 } | |
| 427 | |
| 428 /* Very few conversions are required, but... */ | |
| 429 switch (spec->format) { | |
| 430 case AUDIO_S8: | |
| 431 spec->format = AUDIO_U8; | |
| 432 break; | |
| 433 case AUDIO_U16LSB: | |
| 434 spec->format = AUDIO_S16LSB; | |
| 435 break; | |
| 436 case AUDIO_U16MSB: | |
| 437 spec->format = AUDIO_S16MSB; | |
| 438 break; | |
| 439 } | |
| 440 SDL_CalculateAudioSpec(spec); | |
| 441 | |
| 442 /* initialize the double-back header */ | |
| 443 memset(&audio_dbh, 0, sizeof(audio_dbh)); | |
| 444 doubleBackProc = NewSndDoubleBackProc (sndDoubleBackProc); | |
| 445 sample_bits = spec->size / spec->samples / spec->channels * 8; | |
| 446 | |
| 447 audio_dbh.dbhNumChannels = spec->channels; | |
| 448 audio_dbh.dbhSampleSize = sample_bits; | |
| 449 audio_dbh.dbhCompressionID = 0; | |
| 450 audio_dbh.dbhPacketSize = 0; | |
| 451 audio_dbh.dbhSampleRate = spec->freq << 16; | |
| 452 audio_dbh.dbhDoubleBack = doubleBackProc; | |
| 453 audio_dbh.dbhFormat = 0; | |
| 454 | |
| 455 /* Note that we install the 16bitLittleEndian Converter if needed. */ | |
| 456 if ( spec->format == 0x8010 ) { | |
| 457 audio_dbh.dbhCompressionID = fixedCompression; | |
| 458 audio_dbh.dbhFormat = k16BitLittleEndianFormat; | |
| 459 } | |
| 460 | |
| 461 /* allocate the 2 double-back buffers */ | |
| 462 for ( i=0; i<2; ++i ) { | |
| 463 audio_buf[i] = calloc(1, sizeof(SndDoubleBuffer)+spec->size); | |
| 464 if ( audio_buf[i] == NULL ) { | |
| 465 SDL_OutOfMemory(); | |
| 466 return(-1); | |
| 467 } | |
| 468 audio_buf[i]->dbNumFrames = spec->samples; | |
| 469 audio_buf[i]->dbFlags = dbBufferReady; | |
| 470 audio_buf[i]->dbUserInfo[0] = (long)this; | |
| 471 audio_dbh.dbhBufferPtr[i] = audio_buf[i]; | |
| 472 } | |
| 473 | |
| 474 /* Create the sound manager channel */ | |
| 475 channel = (SndChannelPtr)malloc(sizeof(*channel)); | |
| 476 if ( channel == NULL ) { | |
| 477 SDL_OutOfMemory(); | |
| 478 return(-1); | |
| 479 } | |
| 480 if ( spec->channels >= 2 ) { | |
| 481 initOptions = initStereo; | |
| 482 } else { | |
| 483 initOptions = initMono; | |
| 484 } | |
| 485 channel->userInfo = 0; | |
| 486 channel->qLength = 128; | |
| 487 if ( SndNewChannel(&channel, sampledSynth, initOptions, 0L) != noErr ) { | |
| 488 SDL_SetError("Unable to create audio channel"); | |
| 489 free(channel); | |
| 490 channel = NULL; | |
| 491 return(-1); | |
| 492 } | |
| 493 | |
| 494 /* Start playback */ | |
| 495 if ( SndPlayDoubleBuffer(channel, (SndDoubleBufferHeaderPtr)&audio_dbh) | |
| 496 != noErr ) { | |
| 497 SDL_SetError("Unable to play double buffered audio"); | |
| 498 return(-1); | |
| 499 } | |
| 500 | |
| 501 return 1; | |
| 502 } | |
| 503 | |
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504 #endif /* TARGET_API_MAC_CARBON || USE_RYANS_SOUNDCODE */ |
| 0 | 505 |