Mercurial > sdl-ios-xcode
annotate src/audio/amigaos/SDL_ahiaudio.c @ 1361:19418e4422cb
New configure-based build system. Still work in progress, but much improved
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 16 Feb 2006 10:11:48 +0000 |
| parents | c71e05b4dc2e |
| children | d910939febfa |
| 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 /* Allow access to a raw mixing buffer (for AmigaOS) */ |
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24 |
| 0 | 25 #include "SDL_audio.h" |
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26 #include "../SDL_audio_c.h" |
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27 #include "SDL_ahiaudio.h" |
| 0 | 28 |
| 29 /* Audio driver functions */ | |
| 30 static int AHI_OpenAudio(_THIS, SDL_AudioSpec *spec); | |
| 31 static void AHI_WaitAudio(_THIS); | |
| 32 static void AHI_PlayAudio(_THIS); | |
| 33 static Uint8 *AHI_GetAudioBuf(_THIS); | |
| 34 static void AHI_CloseAudio(_THIS); | |
| 35 | |
| 36 #ifndef __SASC | |
| 37 #define mymalloc(x) AllocVec(x,MEMF_PUBLIC) | |
| 38 #define myfree FreeVec | |
| 39 #else | |
| 40 #define mymalloc malloc | |
| 41 #define myfree free | |
| 42 #endif | |
| 43 | |
| 44 /* Audio driver bootstrap functions */ | |
| 45 | |
| 46 static int Audio_Available(void) | |
| 47 { | |
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48 int ok=0; |
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49 struct MsgPort *p; |
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50 struct AHIRequest *req; |
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51 |
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52 if(p=CreateMsgPort()) |
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53 { |
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54 if(req=(struct AHIRequest *)CreateIORequest(p,sizeof(struct AHIRequest))) |
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55 { |
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56 req->ahir_Version=4; |
| 0 | 57 |
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58 if(!OpenDevice(AHINAME,0,(struct IORequest *)req,NULL)) |
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59 { |
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60 D(bug("AHI available.\n")); |
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61 ok=1; |
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62 CloseDevice((struct IORequest *)req); |
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63 } |
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64 DeleteIORequest((struct IORequest *)req); |
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65 } |
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66 DeleteMsgPort(p); |
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67 } |
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68 |
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69 D(if(!ok) bug("AHI not available\n")); |
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70 return ok; |
| 0 | 71 } |
| 72 | |
| 73 static void Audio_DeleteDevice(SDL_AudioDevice *device) | |
| 74 { | |
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75 SDL_free(device->hidden); |
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76 SDL_free(device); |
| 0 | 77 } |
| 78 | |
| 79 static SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 80 { | |
| 81 SDL_AudioDevice *this; | |
| 82 | |
| 83 #ifndef NO_AMIGADEBUG | |
| 84 D(bug("AHI created...\n")); | |
| 85 #endif | |
| 86 | |
| 87 /* Initialize all variables that we clean on shutdown */ | |
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88 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
| 0 | 89 if ( this ) { |
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90 SDL_memset(this, 0, (sizeof *this)); |
| 0 | 91 this->hidden = (struct SDL_PrivateAudioData *) |
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92 SDL_malloc((sizeof *this->hidden)); |
| 0 | 93 } |
| 94 if ( (this == NULL) || (this->hidden == NULL) ) { | |
| 95 SDL_OutOfMemory(); | |
| 96 if ( this ) { | |
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97 SDL_free(this); |
| 0 | 98 } |
| 99 return(0); | |
| 100 } | |
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101 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| 0 | 102 |
| 103 /* Set the function pointers */ | |
| 104 this->OpenAudio = AHI_OpenAudio; | |
| 105 this->WaitAudio = AHI_WaitAudio; | |
| 106 this->PlayAudio = AHI_PlayAudio; | |
| 107 this->GetAudioBuf = AHI_GetAudioBuf; | |
| 108 this->CloseAudio = AHI_CloseAudio; | |
| 109 | |
| 110 this->free = Audio_DeleteDevice; | |
| 111 | |
| 112 return this; | |
| 113 } | |
| 114 | |
| 115 AudioBootStrap AHI_bootstrap = { | |
| 116 "AHI", Audio_Available, Audio_CreateDevice | |
| 117 }; | |
| 118 | |
| 119 | |
| 120 void static AHI_WaitAudio(_THIS) | |
| 121 { | |
| 122 if(!CheckIO((struct IORequest *)audio_req[current_buffer])) | |
| 123 { | |
| 124 WaitIO((struct IORequest *)audio_req[current_buffer]); | |
| 125 // AbortIO((struct IORequest *)audio_req[current_buffer]); | |
| 126 } | |
| 127 } | |
| 128 | |
| 129 static void AHI_PlayAudio(_THIS) | |
| 130 { | |
| 131 if(playing>1) | |
| 132 WaitIO((struct IORequest *)audio_req[current_buffer]); | |
| 133 | |
| 134 /* Write the audio data out */ | |
| 135 audio_req[current_buffer] -> ahir_Std. io_Message.mn_Node.ln_Pri = 60; | |
| 136 audio_req[current_buffer] -> ahir_Std. io_Data = mixbuf[current_buffer]; | |
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137 audio_req[current_buffer] -> ahir_Std. io_Length = this->hidden->size; |
| 0 | 138 audio_req[current_buffer] -> ahir_Std. io_Offset = 0; |
| 139 audio_req[current_buffer] -> ahir_Std . io_Command = CMD_WRITE; | |
| 140 audio_req[current_buffer] -> ahir_Frequency = this->hidden->freq; | |
| 141 audio_req[current_buffer] -> ahir_Volume = 0x10000; | |
| 142 audio_req[current_buffer] -> ahir_Type = this->hidden->type; | |
| 143 audio_req[current_buffer] -> ahir_Position = 0x8000; | |
| 144 audio_req[current_buffer] -> ahir_Link = (playing>0 ? audio_req[current_buffer^1] : NULL); | |
| 145 | |
| 146 SendIO((struct IORequest *)audio_req[current_buffer]); | |
| 147 current_buffer^=1; | |
| 148 | |
| 149 playing++; | |
| 150 } | |
| 151 | |
| 152 static Uint8 *AHI_GetAudioBuf(_THIS) | |
| 153 { | |
| 154 return(mixbuf[current_buffer]); | |
| 155 } | |
| 156 | |
| 157 static void AHI_CloseAudio(_THIS) | |
| 158 { | |
| 159 D(bug("Closing audio...\n")); | |
| 160 | |
| 161 playing=0; | |
| 162 | |
| 163 if(audio_req[0]) | |
| 164 { | |
| 165 if(audio_req[1]) | |
| 166 { | |
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167 D(bug("Break req[1]...\n")); |
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168 |
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169 AbortIO((struct IORequest *)audio_req[1]); |
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170 WaitIO((struct IORequest *)audio_req[1]); |
| 0 | 171 } |
| 172 | |
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173 D(bug("Break req[0]...\n")); |
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174 |
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175 AbortIO((struct IORequest *)audio_req[0]); |
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176 WaitIO((struct IORequest *)audio_req[0]); |
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177 |
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178 if(audio_req[1]) |
| 0 | 179 { |
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180 D(bug("Break AGAIN req[1]...\n")); |
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181 AbortIO((struct IORequest *)audio_req[1]); |
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182 WaitIO((struct IORequest *)audio_req[1]); |
| 0 | 183 } |
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184 // Double abort to be sure to break the dbuffering process. |
| 0 | 185 |
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186 SDL_Delay(200); |
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187 |
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188 D(bug("Reqs breaked, closing device...\n")); |
| 0 | 189 CloseDevice((struct IORequest *)audio_req[0]); |
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190 D(bug("Device closed, freeing memory...\n")); |
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191 myfree(audio_req[1]); |
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192 D(bug("Memory freed, deleting IOReq...\n")); |
| 0 | 193 DeleteIORequest((struct IORequest *)audio_req[0]); |
| 194 audio_req[0]=audio_req[1]=NULL; | |
| 195 } | |
| 196 | |
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197 D(bug("Freeing mixbuf[0]...\n")); |
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198 if ( mixbuf[0] != NULL ) { |
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199 myfree(mixbuf[0]); |
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200 // SDL_FreeAudioMem(mixbuf[0]); |
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201 mixbuf[0] = NULL; |
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202 } |
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203 |
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204 D(bug("Freeing mixbuf[1]...\n")); |
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205 if ( mixbuf[1] != NULL ) { |
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206 myfree(mixbuf[1]); |
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207 // SDL_FreeAudioMem(mixbuf[1]); |
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208 mixbuf[1] = NULL; |
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209 } |
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210 |
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211 D(bug("Freeing audio_port...\n")); |
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212 |
| 0 | 213 if ( audio_port != NULL ) { |
| 214 DeleteMsgPort(audio_port); | |
| 215 audio_port = NULL; | |
| 216 } | |
| 217 D(bug("...done!\n")); | |
| 218 } | |
| 219 | |
| 220 static int AHI_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 221 { | |
| 222 // int width; | |
| 223 | |
| 224 D(bug("AHI opening...\n")); | |
| 225 | |
| 226 /* Determine the audio parameters from the AudioSpec */ | |
| 227 switch ( spec->format & 0xFF ) { | |
| 228 | |
| 229 case 8: { /* Signed 8 bit audio data */ | |
| 230 D(bug("Samples a 8 bit...\n")); | |
| 231 spec->format = AUDIO_S8; | |
| 232 this->hidden->bytespersample=1; | |
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233 if(spec->channels<2) |
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234 this->hidden->type = AHIST_M8S; |
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235 else |
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236 this->hidden->type = AHIST_S8S; |
| 0 | 237 } |
| 238 break; | |
| 239 | |
| 240 case 16: { /* Signed 16 bit audio data */ | |
| 241 D(bug("Samples a 16 bit...\n")); | |
| 242 spec->format = AUDIO_S16MSB; | |
| 243 this->hidden->bytespersample=2; | |
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244 if(spec->channels<2) |
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245 this->hidden->type = AHIST_M16S; |
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246 else |
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247 this->hidden->type = AHIST_S16S; |
| 0 | 248 } |
| 249 break; | |
| 250 | |
| 251 default: { | |
| 252 SDL_SetError("Unsupported audio format"); | |
| 253 return(-1); | |
| 254 } | |
| 255 } | |
| 256 | |
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257 if(spec->channels!=1 && spec->channels!=2) |
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258 { |
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259 D(bug("Wrong channel number!\n")); |
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260 SDL_SetError("Channel number non supported"); |
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261 return -1; |
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262 } |
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263 |
| 0 | 264 D(bug("Before CalculateAudioSpec\n")); |
| 265 /* Update the fragment size as size in bytes */ | |
| 266 SDL_CalculateAudioSpec(spec); | |
| 267 | |
| 268 D(bug("Before CreateMsgPort\n")); | |
| 269 | |
| 270 if(!(audio_port=CreateMsgPort())) | |
| 271 { | |
| 272 SDL_SetError("Unable to create a MsgPort"); | |
| 273 return -1; | |
| 274 } | |
| 275 | |
| 276 D(bug("Before CreateIORequest\n")); | |
| 277 | |
| 278 if(!(audio_req[0]=(struct AHIRequest *)CreateIORequest(audio_port,sizeof(struct AHIRequest)))) | |
| 279 { | |
| 280 SDL_SetError("Unable to create an AHIRequest"); | |
| 281 DeleteMsgPort(audio_port); | |
| 282 return -1; | |
| 283 } | |
| 284 | |
| 285 audio_req[0]->ahir_Version = 4; | |
| 286 | |
| 287 if(OpenDevice(AHINAME,0,(struct IORequest *)audio_req[0],NULL)) | |
| 288 { | |
| 289 SDL_SetError("Unable to open AHI device!\n"); | |
| 290 DeleteIORequest((struct IORequest *)audio_req[0]); | |
| 291 DeleteMsgPort(audio_port); | |
| 292 return -1; | |
| 293 } | |
| 294 | |
| 295 D(bug("AFTER opendevice\n")); | |
| 296 | |
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297 /* Set output frequency and size */ |
| 0 | 298 this->hidden->freq = spec->freq; |
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299 this->hidden->size = spec->size; |
| 0 | 300 |
| 301 D(bug("Before buffer allocation\n")); | |
| 302 | |
| 303 /* Allocate mixing buffer */ | |
| 304 mixbuf[0] = (Uint8 *)mymalloc(spec->size); | |
| 305 mixbuf[1] = (Uint8 *)mymalloc(spec->size); | |
| 306 | |
| 307 D(bug("Before audio_req allocation\n")); | |
| 308 | |
| 309 if(!(audio_req[1]=mymalloc(sizeof(struct AHIRequest)))) | |
| 310 { | |
| 311 SDL_OutOfMemory(); | |
| 312 return(-1); | |
| 313 } | |
| 314 | |
| 315 D(bug("Before audio_req memcpy\n")); | |
| 316 | |
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317 SDL_memcpy(audio_req[1],audio_req[0],sizeof(struct AHIRequest)); |
| 0 | 318 |
| 319 if ( mixbuf[0] == NULL || mixbuf[1] == NULL ) { | |
| 320 SDL_OutOfMemory(); | |
| 321 return(-1); | |
| 322 } | |
| 323 | |
| 324 D(bug("Before mixbuf memset\n")); | |
| 325 | |
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326 SDL_memset(mixbuf[0], spec->silence, spec->size); |
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327 SDL_memset(mixbuf[1], spec->silence, spec->size); |
| 0 | 328 |
| 329 current_buffer=0; | |
| 330 playing=0; | |
| 331 | |
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332 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 | 333 |
| 334 /* We're ready to rock and roll. :-) */ | |
| 335 return(0); | |
| 336 } |