Mercurial > sdl-ios-xcode
annotate src/audio/amigaos/SDL_ahiaudio.c @ 1343:d5c4f8f6855e
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| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 07 Feb 2006 17:46:19 +0000 |
| parents | d02b552e5304 |
| children | c71e05b4dc2e |
| 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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252
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
|
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23 /* Allow access to a raw mixing buffer (for AmigaOS) */ |
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24 |
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25 #include "SDL_stdlib.h" |
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26 #include "SDL_string.h" |
| 0 | 27 #include "SDL_endian.h" |
| 28 #include "SDL_audio.h" | |
| 29 #include "SDL_audiomem.h" | |
| 30 #include "SDL_audio_c.h" | |
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31 #include "SDL_ahiaudio.h" |
| 0 | 32 |
| 33 /* Audio driver functions */ | |
| 34 static int AHI_OpenAudio(_THIS, SDL_AudioSpec *spec); | |
| 35 static void AHI_WaitAudio(_THIS); | |
| 36 static void AHI_PlayAudio(_THIS); | |
| 37 static Uint8 *AHI_GetAudioBuf(_THIS); | |
| 38 static void AHI_CloseAudio(_THIS); | |
| 39 | |
| 40 #ifndef __SASC | |
| 41 #define mymalloc(x) AllocVec(x,MEMF_PUBLIC) | |
| 42 #define myfree FreeVec | |
| 43 #else | |
| 44 #define mymalloc malloc | |
| 45 #define myfree free | |
| 46 #endif | |
| 47 | |
| 48 /* Audio driver bootstrap functions */ | |
| 49 | |
| 50 static int Audio_Available(void) | |
| 51 { | |
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52 int ok=0; |
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53 struct MsgPort *p; |
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54 struct AHIRequest *req; |
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55 |
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56 if(p=CreateMsgPort()) |
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57 { |
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58 if(req=(struct AHIRequest *)CreateIORequest(p,sizeof(struct AHIRequest))) |
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59 { |
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60 req->ahir_Version=4; |
| 0 | 61 |
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62 if(!OpenDevice(AHINAME,0,(struct IORequest *)req,NULL)) |
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63 { |
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64 D(bug("AHI available.\n")); |
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65 ok=1; |
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66 CloseDevice((struct IORequest *)req); |
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67 } |
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68 DeleteIORequest((struct IORequest *)req); |
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69 } |
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70 DeleteMsgPort(p); |
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71 } |
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72 |
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73 D(if(!ok) bug("AHI not available\n")); |
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74 return ok; |
| 0 | 75 } |
| 76 | |
| 77 static void Audio_DeleteDevice(SDL_AudioDevice *device) | |
| 78 { | |
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79 SDL_free(device->hidden); |
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80 SDL_free(device); |
| 0 | 81 } |
| 82 | |
| 83 static SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 84 { | |
| 85 SDL_AudioDevice *this; | |
| 86 | |
| 87 #ifndef NO_AMIGADEBUG | |
| 88 D(bug("AHI created...\n")); | |
| 89 #endif | |
| 90 | |
| 91 /* Initialize all variables that we clean on shutdown */ | |
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92 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
| 0 | 93 if ( this ) { |
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94 SDL_memset(this, 0, (sizeof *this)); |
| 0 | 95 this->hidden = (struct SDL_PrivateAudioData *) |
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96 SDL_malloc((sizeof *this->hidden)); |
| 0 | 97 } |
| 98 if ( (this == NULL) || (this->hidden == NULL) ) { | |
| 99 SDL_OutOfMemory(); | |
| 100 if ( this ) { | |
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101 SDL_free(this); |
| 0 | 102 } |
| 103 return(0); | |
| 104 } | |
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105 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| 0 | 106 |
| 107 /* Set the function pointers */ | |
| 108 this->OpenAudio = AHI_OpenAudio; | |
| 109 this->WaitAudio = AHI_WaitAudio; | |
| 110 this->PlayAudio = AHI_PlayAudio; | |
| 111 this->GetAudioBuf = AHI_GetAudioBuf; | |
| 112 this->CloseAudio = AHI_CloseAudio; | |
| 113 | |
| 114 this->free = Audio_DeleteDevice; | |
| 115 | |
| 116 return this; | |
| 117 } | |
| 118 | |
| 119 AudioBootStrap AHI_bootstrap = { | |
| 120 "AHI", Audio_Available, Audio_CreateDevice | |
| 121 }; | |
| 122 | |
| 123 | |
| 124 void static AHI_WaitAudio(_THIS) | |
| 125 { | |
| 126 if(!CheckIO((struct IORequest *)audio_req[current_buffer])) | |
| 127 { | |
| 128 WaitIO((struct IORequest *)audio_req[current_buffer]); | |
| 129 // AbortIO((struct IORequest *)audio_req[current_buffer]); | |
| 130 } | |
| 131 } | |
| 132 | |
| 133 static void AHI_PlayAudio(_THIS) | |
| 134 { | |
| 135 if(playing>1) | |
| 136 WaitIO((struct IORequest *)audio_req[current_buffer]); | |
| 137 | |
| 138 /* Write the audio data out */ | |
| 139 audio_req[current_buffer] -> ahir_Std. io_Message.mn_Node.ln_Pri = 60; | |
| 140 audio_req[current_buffer] -> ahir_Std. io_Data = mixbuf[current_buffer]; | |
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141 audio_req[current_buffer] -> ahir_Std. io_Length = this->hidden->size; |
| 0 | 142 audio_req[current_buffer] -> ahir_Std. io_Offset = 0; |
| 143 audio_req[current_buffer] -> ahir_Std . io_Command = CMD_WRITE; | |
| 144 audio_req[current_buffer] -> ahir_Frequency = this->hidden->freq; | |
| 145 audio_req[current_buffer] -> ahir_Volume = 0x10000; | |
| 146 audio_req[current_buffer] -> ahir_Type = this->hidden->type; | |
| 147 audio_req[current_buffer] -> ahir_Position = 0x8000; | |
| 148 audio_req[current_buffer] -> ahir_Link = (playing>0 ? audio_req[current_buffer^1] : NULL); | |
| 149 | |
| 150 SendIO((struct IORequest *)audio_req[current_buffer]); | |
| 151 current_buffer^=1; | |
| 152 | |
| 153 playing++; | |
| 154 } | |
| 155 | |
| 156 static Uint8 *AHI_GetAudioBuf(_THIS) | |
| 157 { | |
| 158 return(mixbuf[current_buffer]); | |
| 159 } | |
| 160 | |
| 161 static void AHI_CloseAudio(_THIS) | |
| 162 { | |
| 163 D(bug("Closing audio...\n")); | |
| 164 | |
| 165 playing=0; | |
| 166 | |
| 167 if(audio_req[0]) | |
| 168 { | |
| 169 if(audio_req[1]) | |
| 170 { | |
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171 D(bug("Break req[1]...\n")); |
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172 |
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173 AbortIO((struct IORequest *)audio_req[1]); |
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174 WaitIO((struct IORequest *)audio_req[1]); |
| 0 | 175 } |
| 176 | |
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177 D(bug("Break req[0]...\n")); |
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178 |
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179 AbortIO((struct IORequest *)audio_req[0]); |
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180 WaitIO((struct IORequest *)audio_req[0]); |
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181 |
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182 if(audio_req[1]) |
| 0 | 183 { |
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184 D(bug("Break AGAIN req[1]...\n")); |
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185 AbortIO((struct IORequest *)audio_req[1]); |
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186 WaitIO((struct IORequest *)audio_req[1]); |
| 0 | 187 } |
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188 // Double abort to be sure to break the dbuffering process. |
| 0 | 189 |
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190 SDL_Delay(200); |
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191 |
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192 D(bug("Reqs breaked, closing device...\n")); |
| 0 | 193 CloseDevice((struct IORequest *)audio_req[0]); |
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194 D(bug("Device closed, freeing memory...\n")); |
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195 myfree(audio_req[1]); |
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196 D(bug("Memory freed, deleting IOReq...\n")); |
| 0 | 197 DeleteIORequest((struct IORequest *)audio_req[0]); |
| 198 audio_req[0]=audio_req[1]=NULL; | |
| 199 } | |
| 200 | |
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201 D(bug("Freeing mixbuf[0]...\n")); |
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202 if ( mixbuf[0] != NULL ) { |
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203 myfree(mixbuf[0]); |
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204 // SDL_FreeAudioMem(mixbuf[0]); |
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205 mixbuf[0] = NULL; |
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206 } |
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207 |
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208 D(bug("Freeing mixbuf[1]...\n")); |
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209 if ( mixbuf[1] != NULL ) { |
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210 myfree(mixbuf[1]); |
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211 // SDL_FreeAudioMem(mixbuf[1]); |
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212 mixbuf[1] = NULL; |
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213 } |
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214 |
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215 D(bug("Freeing audio_port...\n")); |
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216 |
| 0 | 217 if ( audio_port != NULL ) { |
| 218 DeleteMsgPort(audio_port); | |
| 219 audio_port = NULL; | |
| 220 } | |
| 221 D(bug("...done!\n")); | |
| 222 } | |
| 223 | |
| 224 static int AHI_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 225 { | |
| 226 // int width; | |
| 227 | |
| 228 D(bug("AHI opening...\n")); | |
| 229 | |
| 230 /* Determine the audio parameters from the AudioSpec */ | |
| 231 switch ( spec->format & 0xFF ) { | |
| 232 | |
| 233 case 8: { /* Signed 8 bit audio data */ | |
| 234 D(bug("Samples a 8 bit...\n")); | |
| 235 spec->format = AUDIO_S8; | |
| 236 this->hidden->bytespersample=1; | |
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237 if(spec->channels<2) |
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238 this->hidden->type = AHIST_M8S; |
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239 else |
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240 this->hidden->type = AHIST_S8S; |
| 0 | 241 } |
| 242 break; | |
| 243 | |
| 244 case 16: { /* Signed 16 bit audio data */ | |
| 245 D(bug("Samples a 16 bit...\n")); | |
| 246 spec->format = AUDIO_S16MSB; | |
| 247 this->hidden->bytespersample=2; | |
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248 if(spec->channels<2) |
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249 this->hidden->type = AHIST_M16S; |
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250 else |
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251 this->hidden->type = AHIST_S16S; |
| 0 | 252 } |
| 253 break; | |
| 254 | |
| 255 default: { | |
| 256 SDL_SetError("Unsupported audio format"); | |
| 257 return(-1); | |
| 258 } | |
| 259 } | |
| 260 | |
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261 if(spec->channels!=1 && spec->channels!=2) |
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262 { |
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263 D(bug("Wrong channel number!\n")); |
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264 SDL_SetError("Channel number non supported"); |
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265 return -1; |
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266 } |
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267 |
| 0 | 268 D(bug("Before CalculateAudioSpec\n")); |
| 269 /* Update the fragment size as size in bytes */ | |
| 270 SDL_CalculateAudioSpec(spec); | |
| 271 | |
| 272 D(bug("Before CreateMsgPort\n")); | |
| 273 | |
| 274 if(!(audio_port=CreateMsgPort())) | |
| 275 { | |
| 276 SDL_SetError("Unable to create a MsgPort"); | |
| 277 return -1; | |
| 278 } | |
| 279 | |
| 280 D(bug("Before CreateIORequest\n")); | |
| 281 | |
| 282 if(!(audio_req[0]=(struct AHIRequest *)CreateIORequest(audio_port,sizeof(struct AHIRequest)))) | |
| 283 { | |
| 284 SDL_SetError("Unable to create an AHIRequest"); | |
| 285 DeleteMsgPort(audio_port); | |
| 286 return -1; | |
| 287 } | |
| 288 | |
| 289 audio_req[0]->ahir_Version = 4; | |
| 290 | |
| 291 if(OpenDevice(AHINAME,0,(struct IORequest *)audio_req[0],NULL)) | |
| 292 { | |
| 293 SDL_SetError("Unable to open AHI device!\n"); | |
| 294 DeleteIORequest((struct IORequest *)audio_req[0]); | |
| 295 DeleteMsgPort(audio_port); | |
| 296 return -1; | |
| 297 } | |
| 298 | |
| 299 D(bug("AFTER opendevice\n")); | |
| 300 | |
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301 /* Set output frequency and size */ |
| 0 | 302 this->hidden->freq = spec->freq; |
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303 this->hidden->size = spec->size; |
| 0 | 304 |
| 305 D(bug("Before buffer allocation\n")); | |
| 306 | |
| 307 /* Allocate mixing buffer */ | |
| 308 mixbuf[0] = (Uint8 *)mymalloc(spec->size); | |
| 309 mixbuf[1] = (Uint8 *)mymalloc(spec->size); | |
| 310 | |
| 311 D(bug("Before audio_req allocation\n")); | |
| 312 | |
| 313 if(!(audio_req[1]=mymalloc(sizeof(struct AHIRequest)))) | |
| 314 { | |
| 315 SDL_OutOfMemory(); | |
| 316 return(-1); | |
| 317 } | |
| 318 | |
| 319 D(bug("Before audio_req memcpy\n")); | |
| 320 | |
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321 SDL_memcpy(audio_req[1],audio_req[0],sizeof(struct AHIRequest)); |
| 0 | 322 |
| 323 if ( mixbuf[0] == NULL || mixbuf[1] == NULL ) { | |
| 324 SDL_OutOfMemory(); | |
| 325 return(-1); | |
| 326 } | |
| 327 | |
| 328 D(bug("Before mixbuf memset\n")); | |
| 329 | |
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330 SDL_memset(mixbuf[0], spec->silence, spec->size); |
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331 SDL_memset(mixbuf[1], spec->silence, spec->size); |
| 0 | 332 |
| 333 current_buffer=0; | |
| 334 playing=0; | |
| 335 | |
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336 D(bug("AHI opened: freq:%ld mixbuf:%lx/%lx buflen:%ld bits:%ld channels:%ld\n",spec->freq,mixbuf[0],mixbuf[1],spec->size,this->hidden->bytespersample*8,spec->channels)); |
| 0 | 337 |
| 338 /* We're ready to rock and roll. :-) */ | |
| 339 return(0); | |
| 340 } |